555results about How to "Guaranteed suitability" patented technology

The invention relates to a quick chemical leakage predicating and warning emergency response decision-making method which combines diffusion model simulation with a neural network and a gas sensor system and is applied to quick warning and aid decision making of leakage of harmful gas in an industrial park. The method includes park risk factor identification, numerical simulation, data screening, neural network training and sensor system and neural network model integration, wherein the park risk factor identification is used for identifying various possible leakage accidents, the numerical simulation includes simulating all the possible accidents to obtain a range of influences of the harmful gas, the data screening includes extracting and reconstructing an effective part in a numerical simulation result according to actual sensor layout, the neural network training includes training specific neural network models by the aid of screened data so as to acquire model parameters aiming for the specific industrial park and surrounding conditions and using redundant data for parameter validation, and sensor system and neural network model integration includes combining the models with a sensor DCS (distributed control system).

The invention provides a real-time face recognition method based on a deep neural network and adjacent element analysis. According to the invention, at first, a multi-layer neural network is practiced through a large-scale face database having the advantage of good diversity, wherein layers besides the last layer are non-linear layers, and the tail layer is a linear layer; then, the obtained network is practiced continuously on the basis of a hybrid face database through the supervised adjacent element analysis method to make the network has more deep understanding of face images so as to achieve the purposes of shorting the face image distance between same individuals and increasing the face image distance between different individuals; and finally, in the actual face recognition stage, the invention provides a concept of 'search radius', so the recognition time can be shortened on the premise of ensuring the recognition rate to realize real-time face recognition. According to the invention, the advantage of high recognition rate can be realized, and at the same time, according to the invention, the advantage of fast recognition speed can be realized, so that the methof of the invention is suitable for being applied in real-time face recognition tasks.

The invention relates to a commercial building central air-conditioning load control system interacted with power grid and a method thereof. The system comprises a data acquisition device, a controllable load calculation device, a control strategy generation device, a strategy plane expert base, a control strategy execution device, a display interface device and an alarm processing device, wherein the controllable load calculation device, the data acquisition device and the control strategy execution device respectively communicate with terminal equipment. Bidirectional interaction between commercial building central air-conditioning and the power grid is realized, so that power supply enterprises can formulate a reasonable load control plan according to the controllable load capacity fed by each commercial building central air conditioner, and the peak clipping function of the commercial building central air-conditioning on the power grid is fully utilized; and moreover, the commercial building central air-conditioning fully exerts demand-side response, the suitability of a building environment is guaranteed, energy conservation of the commercial building is realized, and the economical efficiency of overall power consumption is improved.

The invention relates to a slope water-soil loss experiment device and method under combined extreme meteorological conditions. The experiment device comprises an experiment table, a combined extreme environment simulation unit and a control system unit, wherein the experiment table comprises a bottom base, a slope base plate, a downstream baffle plate, soil block standard elements and an experiment table regulating device; the combined extreme environment simulation unit comprises a rainfall simulation device, an air field simulation device, a freezing rain simulation device, a snowfall simulation device, a sunlight simulation device, an air temperature simulation device and an overland flow simulation device; the control system unit comprises a power supply system, a water supply system and a signal acquisition and processing system. According to the invention, the slope water-soil loss experiment device and method under combined extreme meteorological conditions perform indoor simulation and measurement of a slope water body loss situation under a single or combined extreme meteorological conditions of rain storm, rain and snow, freezing rain, flood, drought, high temperature and the like, can achieve accurate and reliable results, and can be widely applied to water-soil loss monitoring, principle analysis and governance under complex variable meteorological conditions.

The invention relates to the technical field of mobile internet application and development, and particularly relates to a system based on an SDK (Software Development Kit) for rapidly building a mobile internet application module. The system sequentially comprises a content displaying layer, an interface framework layer, a function module layer and a configuration management layer from the top to the bottom; by building an SDK module on the basis of an API uniform interface, the SDK module is encapsulated into an API which can be directly integrated to an objective and used in the mobile internet, so that the suitability, accuracy and robustness of the SDK can be ensured, and the system is suitable for rapidly and effectively deploying in mobile internet application. The invention further provides a method based on the SDK for rapidly building the mobile internet application module, the method is applied to the above system and comprises the following steps: firstly, the interfaces of the SDK are unified so as to build the SDK module with the API uniform interface, then the API of the SDK module is directly integrated to the objective and used in the mobile internet, so that the burdensome work of editing codes to SDKs with different versions is eliminated, the workload of mobile internet development is reduced, and the development efficiency is improved greatly.

The invention discloses a coaxial centrifugal spinning device and method. The device comprises a direct-current motor, a supporting device, a spinning support, coaxial centrifuge tubes, spinning needle heads and a receiving device, wherein the direct-current motor is fixed to the supporting device, the spinning support is directly and fixedly connected with an output shaft of the direct-current motor, the coaxial centrifuge tubes are fixed to the spinning support, and under the action of the direct-current motor, the spinning support drives the coaxial centrifuge tubes to rotate at high speed; each coaxial centrifuge tube comprises an outer layer centrifuge tube and an inner layer centrifuge tube, each spinning needle head comprises an outer layer needle head and an inner layer needle head, during spinning, a spinning solution or melt in the outer layer centrifuge tubes and the inner layer centrifuge tubes is tossed out under the action of centrifuge force, an outer layer solution wraps an inner layer solution, and superfine fiber of a skin-core structure is formed due to centrifuge force drafting, solvent volatilization and phase separation. The coaxial centrifugal spinning device is simple, high in spinning speed and production efficiency and capable of producing coaxial superfine fiber on a large scale.

The invention discloses a cleaning and disinfection device for laboratory equipment. The cleaning and disinfection device comprises a box body, a conveying structure, a clamping and overturning structure, a spraying and cleaning structure, a washing structure and a drying structure; a supporting plate is arranged at the lower end in the box body; uniformly distributed water leakage holes are formed in the left side of a wall body of the supporting plate; the upper side of the right end of the box body is provided with an opening; the conveying structure is arranged laterally at the upper end of the supporting plate; the clamping and overturning structure is arranged at the upper end of the conveying structure; the spraying and cleaning structure is arranged on the left side of the upper end of the box body; and the cleaning and disinfection device for the laboratory equipment is simple to operate, moderately holds fixes the equipment, can realize the overturning operation of the equipment during cleaning and disinfection, ensures the completeness of cleaning, washing and drying, and stably and accurately position and convey the equipment to a working area to form a complete set ofcomplete disinfectant spray disinfection, pure water showering cleaning and drying operations, ensures the quality of cleaning and disinfection, and reduces the workload of personnel.

The invention discloses an adjustable bending sheath tube, which comprises a tube body, a traction fiber and a handle. The traction fiber can slide in the tube body and the handle, the tube body has a near end and a far end, the near end is connected with the handle, the handle comprises a branch which is arranged on one side near the near end of the tube body, a movable part which can transversely move along the branch is mounted on the branch, a near end of the traction fiber is fixed on the movable part, a far end of the traction fiber is fixed on the far end of the tube body, an elastic section is positioned near the far end of the tube body, the bending angle of the elastic section is changed when the movable part moves transversely on the branch, and the movable part is threaded with the branch. Compared with bending sheath tubes in prior art, the bending sheath tube is capable of shortening the effective lengthen of the handle and improving the accuracy of the angle controlling, and the operating process is enabled to be convenient and easy to control.

The invention discloses a method for grasping data from an unstructured financial report based on an XBRL technology. The method comprises the specific implementation steps that an XBRL classification standard serves as a financial report model, and extension markup is carried out on classification standard elements and an ELR; the Word or Excel financial report of an unstructured format is used, a rule for analyzing a financial sheet in a sheet mode is preset, and correspondence relation mapping from sheet data to the XBRL classification standard report model is achieved; for two special dimensions of a report body and time, the financial report is matched through special key words, and automatic conversion from the sheet data to the XBRL data is achieved on the basis of the corresponding relation. Compared with the prior art, the method for grasping data from the unstructured financial report based on the XBRL technology rapidly converts a large number of existing unstructured financial reports to be in an XBRL format to be stored, provides data support for analysis and application by enterprises, and promotes application of the XBRL technology in enterprises.

The invention provides a multi-view reconstruction method based on a deep learning contour network. The method comprises steps of introducing a deep learning architecture, carrying out three-dimensional shape coding, constructing a contour network, and carrying out network training and testing. To be specific, a deep learning contour network is introduced and the used for learning three-dimensional shape codes of one or more input images; a new view is generated by using a code adjustment decoder; with introduction of a contour-based proxy loss, when the decoder does not include three-dimensional representation, the network uses the two-dimensional loss to encode the three-dimensional shape, wherein the two-dimensional loss is not limited by the three-dimensional representation resolution;and a massive spotted object data set network is generated and pretrained and then micro adjustment of the contour network of the data set is carried out. According to the invention, the three-dimensional shape is learned by using the neural network and the contour generated in the new view forces the network to code a three-dimensional shape; information of multiple views is combined; and the multi-view reconstruction performance is improved.

The invention provides a pneumatic walnut hull breaking machine and belongs to the field of forest fruits. The pneumatic walnut hull breaking machine consists of a machine frame, a transmission control device, a feeding mechanism and a hull breaking device. The hull breaking device is installed on the machine frame and consists of impact cylinders and holding cylinders which are installed among partition plates of a working rack in a connecting mode. The transmission control device is installed under the front portion of the machine frame and consists of an electric motor, a poking wheel, a control cam, a driving chain wheel, a grooved wheel, side-by-side front end chain wheels, a driven chain wheel, side-by-side back end chain wheels, a clamping switch, a holding switch and a strike switch, wherein the poking wheel, the control cam and the electric motor are sleeved coaxially, the driving chain wheel and the grooved wheel are sleeved on a lower shaft, the side-by-side front end chain wheels and the driven chain wheel are sleeved on an upper shaft, the side-by-side back end chain wheels are installed at the back portion of the machine frame, and the clamping switch, the holding switch and the strike switch are installed at the lower portion of the machine frame at intervals. The driving wheel, the driven wheel, the front end chain wheels and the back end chain wheels are respectively linked through chains, a material box is installed at the back portion of the working rack, a slot is arranged on one wall of the box, and the feeding mechanism is arranged under the position tightly close to the slot and consists of the side-by-side chains, rotary rollers installed on the chains at intervals in a connecting mode, rolling plate supporting the rotary rollers and tensioning chain wheels. The pneumatic walnut hull breaking machine is strong in adaptability on walnut types, complete in walnut hull separation, few in broken walnut nuts and high in hull breaking efficiency.

The invention provides a charging pile system based on the internet of things and a control method of the charging pile system. The charging pile system comprises a charging station control center, a communication module, a charging pile and a battery pack information storage device. After an electric automobile is in communication connection with the charging station control center, a charging port suitable for the electric automobile is matched by the charging station control center, pairing of the electric automobile and the charging pile is completed, and the electric automobile is guided by generated pairing information to the charging position of the charging pile. According to the charging pile system based on the internet of things and the control method of the charging pile system, an applicable charging instruction is obtained through matching of the battery pack information storage device and electric automobile battery information, unstable influence on the power grid load caused by charging of the electric automobile is effectively avoided, and both the expectations of consumers for the driving distance, the performance and the reliability of the electric automobile and the expectations of an accumulator of the electric automobile for the time, the cost and the convenience which are related to charging are improved; and the pairing information guides the electric automobile to a charging area, the charging convenience and rapidness of the electric automobile are improved, and the applicability of the electric automobile in the process of generalization and popularization is guaranteed.

Disclosed are methods and systems for generating dynamic context aware help for operations supported by at least one reporting system. The methods and systems relate to receiving a help request for an operation from a client computer including at least one report file, analyzing the at least one report file to generate context data, dynamically generating help data according to the context data and the operation and sending the generated help data to the client computer.

The invention discloses a power transmission and distribution network integrated reactive power optimization method based on distributed computation. A generalized master-slave method is used for decomposing a power transmission and distribution network problem to three parts, namely power transmission network reactive power optimization, power distribution network reactive power optimization and boundary information exchange. A quadratic penalty function and a primal-dual interior point method are utilized for alternately computing a power transmission reactive power optimization sub-problem and a power distribution reactive power optimization sub-problem. Through exchanging boundary influence factors (boundary connecting node voltage, equivalent power and target function boundary Lagrange multiplier information), coordination participation is realized, and furthermore distributed computation for whole network reactive power optimization is realized, wherein discrete variables which commonly exist in reactive power optimization cause high difficulty in computing the boundary multiplier. The quadratic penalty function is introduced for regulating the discrete variables so that processing of the discrete variables is realized based on a differentiable power transmission and distribution global optimization target function. According to the method of the invention, a distributed computation method is utilized for settling an integrated reactive power optimization problem of the power transmission and distribution network, thereby keeping an existing computation mode of the power transmission and distribution network and realizing relatively high computation precision.

The invention relates to technology field of mechanical engineering and mathematics research, specifically relates to a planning method of asymmetric variable acceleration based on optimal distribution in the time-domain of main frequency energy, and the method includes: solving positioning course of nonlinear finite element model including the free kinematics and parametric motion function, after execution stopping judging the amplitude of the drive end whether or not meets the positioning accuracy, if meet, the amplitude energy time is decayed,if not meet ,it will go on solving; judging the target response time whether or not it is a minimal value,if the time is a minimal value, determining to set the motion parameters as the optimal parameter ,if the time is not a minimal value,calculating the motion parameters of step and gradient and reset motion parameters to be solve. The invention by the above method solves the motion planning question of nonlinear effect and high speed and high acceleration under precision positioning requirements. The precision positioning and position / force smooth handoff in high speed condition can be achieved. It also adapts to motion planning question of performance administration to the traditional solving method.

The invention discloses a case-based reasoning method facing hazardous chemical accident emergency aid decision making. The method includes the steps: 1, structurally expressing accident characteristics of accident cases of dangerous chemicals and the emergency rescue process thereof, and serving as sample cases of emergency aid decision-making; 2, acquiring feature information parameters of the incident to be determined at a site, and converting text information of the feature information parameters into numerical attributes on the basis of the parameter numerical attribute extraction rule toconstitute a reasoning evaluation set; 3, setting a weight, calculating the local similarity of each accident feature parameter in the reasoning evaluation set and the overall similarity of the sample cases, and selecting a certain number of decision alternative cases; and 4, reconstructing emergency rescue parameter information of the stage of alternative cases with the highest similarity through comparison and giving the emergency rescue parameter information to the incident to be determined as an emergency aid decision making result. The invention can ensure the effectiveness and applicability of the emergency aid decision-making information to a certain extent, and improve the efficiency of emergency treatment.

The invention discloses a mercapto-beta-cyclodextrin modified silver nano-rod array, its preparation method and its use. The array is a silver nano-rod array with the surface modified by mercapto-beta-cyclodextrin, wherein the lengths of silver nano-rods are 150-600nm, the diameters of the silver nano-rods are 60-90nm, the space between each two silver nano-rods is 10-40nm, and the substrate of the array is formed by superposing one or more than two of a silver film, a gold film, a copper film and a nickel film which have the thicknesses of 20-50mum. The preparation method comprises the following steps: obtaining a through hole alumina template through using a secondary anode oxidation method, sputtering a metal conductive film on one surface of the through hole alumina template through using an ion sputtering method to obtain an alumina template with the metal conductive film, carrying out electric deposition through placing the alumina template with the metal conductive film in a silver electrolyte to obtain an alumina template with holes provided with the silver nano-rods and one surface coated with the metal conductive film, etching off the alumina template through putting the resultant alumina template in an acidic or strongly alkaline solution, and immersing the resultant material in an aqueous solution of the mercapto-beta-cyclodextrin for at least 1h to prepare the mercapto-beta-cyclodextrin modified silver nano-rod array. The mercapto-beta-cyclodextrin modified silver nano-rod array can be used for rapidly detecting trace PCB77 or PCB101.

The invention discloses a method for calculating the electromagnetic vibration noise of a motor, which comprises the following steps: calculating the distribution of the electromagnetic force densityof the motor according to the operation condition of the motor, and calculating the static deformation and the natural frequency of the motor respectively; according to the distribution of the electromagnetic force density, the electromagnetic resultant force on the stator teeth of the motor is calculated, and the time-space harmonic of the electromagnetic resultant force is calculated. The frequency response function of the motor structure corresponding to each vibration mode is calculated according to the natural frequencies of each vibration mode corresponding to each spatial order of the electromagnetic force, and the transfer function of the motor mechanical structure is calculated according to the static deformation function and the frequency response function. The vibration displacement of the motor surface is calculated according to the time-space harmonics and the transfer function. The modal acoustic radiation efficiency of the motor housing is obtained, and the electromagnetic vibration noise of the motor is calculated according to the modal acoustic radiation efficiency and vibration displacement. In the process of analyzing the vibration and noise of the motor, the invention ensures that the calculation accuracy meets the precision requirement, and reduces the calculation amount to avoid consuming a large amount of calculation resources.

The invention discloses a silver nanowire array electrode, a preparation method and application thereof. The electrodes are silver nanowires forming an array with a diameter of 50-70nm and a wire length of 250-350nm. The bottom of the array is a silver film of 130-170nm and a copper film of 0.5-1mm; the method is to use a secondary anode on the aluminum sheet first Oxidation method to obtain a through-hole alumina template with a pore diameter of 50-70nm, and then use the ion sputtering method to vapor-deposit a silver film on one side of the alumina template, and then place the alumina template with a silver film on one side in a silver electrolysis solution, use the electrodeposition method to electrodeposit at a constant voltage of 0.08 to 0.12V for 1 to 5 minutes, then place it in the copper electrolyte, use the electrodeposition method to electrodeposit 2.5 to 3.5 at a current of 8 to 12mA / cm2 h, after that, put the aluminum oxide template with silver nanowires in the hole, one side covered with silver film and copper film in sequence, in acid solution or strong alkali solution to corrode the aluminum oxide template, and make silver nanowire array electrode. Array electrodes can be used as sensitive elements for trace detection or reduction of halogenated organic compounds.

The invention relates to an electromechanical equipment digital twin model consistency maintaining method. The method is applied to digital twinning model consistency of a digital space to a physicalspace. a digital twinning mapping module is arranged between the physical space and the digital space; Electromechanical equipment data collected by a data sensing device in a physical space is mappedto a digital space, and an updated digital twin model is obtained through a data processing module, a performance attenuation updating module and a self-updating digital twin model overall construction module in the digital space. The electromechanical equipment digital twin model consistency maintaining method comprises the following steps: carrying out modal analysis on a performance attenuation part; and analyzing the function static link library file through the modal neutral file, combining the performance attenuation part with other associated part systems, constructing an integrity attenuation updating electromechanical equipment digital twinning model, maintaining the consistency with physical electromechanical equipment in the use period, and providing support for data communication in the whole use period.

The invention discloses segmented variable-coefficient iron loss model for fine analysis of loss of an alternating-current motor and belongs to the technical field of loss calculation and analysis of the alternating-current motor. The model is shown in the specification. According to the model, loss data of silicon steel sheets are measured actually at a series of frequencies and in magnetic density and analyzed in combination of a classical binomial model, eddy-current loss increase caused by magnetic circuit saturation and magnetic hysteresis loss increase caused by harmonic magnetic fields are considered, four additional loss coefficients changing with the magnetic density and the frequencies in a segmented manner are introduced in an eddy-current item and a magnetic hysteresis loss item, and accordingly, the model is established. The main coefficients in the model change with magnetic density amplitudes and frequencies, besides, magnetic hysteresis loss and eddy-current loss caused by fundamental waves and harmonic magnetic fields can be accurately separated by means of the model, and the fine analysis of the iron loss can be realized.

The invention provides a cooperative multi-aircraft target distribution method based on a hybrid optimization algorithm. The method comprises the following steps that (11) flying fuel consumption and flying time and length of each Chinese aircraft are collected; (12) a fitness function in a discrete particle swarm optimization is built; (13) target distribution is conducted on the Chinese aircrafts according to the discrete particle swarm optimization. The cooperative multi-aircraft target distribution method based on the hybrid optimization algorithm can cope with battlefield situations constantly changing and quickly determine target distribution schemes, and guarantees real-time performance of the hybrid optimization algorithm; meanwhile, the distribution schemes can be consistent with the reality and be verified in the follow-up path planning process, and guarantee applicability of the algorithm.

The invention discloses an optical engine with variable view field. The optical engine comprises a cylinder body of the engine, a cylinder cover and a lengthened piston, wherein the middle part of the lengthened piston has hollowed structure, a reflector is placed in the space of the hollowed structure, and a piece of circular planar quartz glass is arranged at the top of the lengthened piston; aguide base is fixed at the upper part of the cylinder body, and cylinder sleeves are fixed between the guide base and the cylinder cover; the number of the cylinder sleeves is three, the heights of the three cylinder sleeves are consistent, and the connecting mode between each cylinder sleeve and the cylinder cover at the upper part of the cylinder sleeve and between the cylinder sleeve and the guide base at the lower part of the cylinder sleeve and the geometric dimension of the cylinder sleeves are the same to ensure interchangeability of the three cylinder sleeves; and the three cylinder sleeves are respectively a metal lengthened cylinder sleeve, an annular quartz glass cylinder sleeve and a planar mosaic glass cylinder sleeve, and variable view field of the optical engine is realizedby alternately using the three cylinder sleeves. The problem that a conventional optical engine cannot meet multiple measurement requirements at the same time is solved, and various measurement requirements are met by integrated design and adaptive design of the cylinder sleeves.

The invention discloses a computer case with a heat dissipation and purification function. The computer case comprises a base plate; the base plate is fixedly connected with the case through damping devices; a cooler is fixedly connected with one side of the bottom of the inner chamber of the case; one side of the cooler is fixedly connected with a cooling fan fixing rod; the cooling fan fixing rod is fixedly connected with a cooling fan through a cooling fan base; a dustproof ventilation opening is mounted at the position of one side of the inner wall of the case right corresponding to the cooling fan; the middle position of the base of the inner chamber of the case is fixedly connected with a water pump mounting table; a water pump is mounted on the top of the water pump mounting table; and the water pump is communicated with the cooler through a water inlet pipe. According to the computer case with the heat dissipation and purification function, a computer is displayed circularly, the problem that the dust in an existing case needs to be cleaned by a user is solved, the working safety of the computer is ensured through damping, and the relatively efficient work of the computer is ensured through utilization of a good heat dissipation system.

The invention discloses a self-adaption noise reduction device for low frequency noise in an indoor environment. The self-adaption noise reduction device for low frequency noise in the indoor environment comprises a primary microphone, an inverse sound source, a frequency adjusting device and a secondary microphone. The secondary microphone is a high-sensitivity omnidirectional electret secondary microphone with the response frequency ranging from 20Hz to 20KHz. The primary microphone and the secondary microphone are connected through an audio cable and a 16-bit analog-to-digital converter respectively. The 16-bit analog-to-digital converter is connected with an I / O read-write parallel interface of the frequency adjusting device through a 16-pin parallel interface bus. The reverse sound source is connected with an MCU processor of the frequency adjusting device through a serial analog-to-digital converter. The self-adaption noise reduction device for low frequency noise in the indoor environment is particularly suitable for low frequency noise processing in a household environment, low frequency noise emitted by indoor electronic devices and electrical devices can be obviously reduced, the living environment is improved, and the living quality is improved. The self-adaption noise reduction device for low frequency noise in the indoor environment is small in size, capable of being used once a system is powered, free of a complex installation process, low in manufacturing cost and capable of being completely purchased and deployed by general users.

The invention discloses a hydrate decomposition inhibitor suitable for natural gas hydrate formation drilling. The hydrate decomposition inhibitor is prepared from the following raw materials by masspercent: 0 to 100 percent of poly 3-methylene2-pyrrolidone, 0 to 100 percent of lecithin, and 0 to 100 percent of poly N-vinylpyrrolidone. When the hydrate decomposition inhibitor suitable for naturalgas hydrate formation drilling, provided by the invention is used for ocean or frozen earth natural gas hydrate drilling operation, the decomposition of the hydrate can be effectively inhibited, thestability of the natural gas hydrate formation can be improved, and a series of underground accidents caused by the decomposition of the hydrate can be avoided.

The invention relates to a village and town building reference room heat model-based building energy consumption acquisition method, which comprises the following steps: (1) acquiring a calculation condition for establishing a village and town building reference room heat model; (2) acquiring meteorological data of a region where a village and town building is located; (3) establishing a village and town building reference room heat model according to the calculation condition for the village and town building reference room heat model and the meteorological data of the region where the village and town building is located; (4) obtaining an energy consumption value of a reference room of the village and town building according to the village and town building reference room heat model, and further calculating an energy consumption value of the village and town building. Compared with the prior art, the method has the advantages of high pertinence, simplicity, high reliability, high calculation efficiency and the like.

The invention refers to an analysis system and computer implemented method for analyzing biological samples. the invention relates to an analysis system for analyzing biological samples comprising: at least one analyzer for performing an analysis and a decision unit being operable to determine in response to the receipt of the analysis request (112) whether results obtained from performing the analysis on the sample indicated in the analysis request (112) are valid, wherein this determination is executed by retrieving the meta information (126) assigned to the sample and by applying the at least one condition on the meta information (126) and wherein the at least one applied condition comprises at least a condition on whether the sample allows a valid analysis on the sample, and wherein the decision unit (109) returns the decision that the analysis exercised on the indicated sample will return a valid result in case the conditions of the condition set are met by the sample.

The invention belongs to the technical field of welding materials and particularly relates to a nickel-based welding rod used for ultralow-temperature steel and a preparation method of the nickel-based welding rod. The welding rod comprises a welding core wire, chemical powder and an adhesion agent; the mass ratio between the chemical powder and the welding rod is 25-27:100, and the mass ratio between the chemical powder and the adhesion agent is 100:25-30. When the welding rod prepared through the preparation method is welded, the electric arc is stable, the splatter is slight, the sediment separation is good, the form is beautiful, the welding can be conducted through alternate currents or direct currents, and the all-position operation performance is good. The nickel-based welding rod is mainly used for the nickel-based alloy welding with heat resistance and corrosion resistance requirements, and the nickel-based welding rod can also be used for the welding of some alloy hard to weld and dissimilar steel.

The invention relates to a firewall data packet matching algorithm based on rule tree retrieval. The method provided by the invention comprises the step of a preprocessing rules, constructing a rule tree and matching a data packet; the step of processing the rules is to perform formalization and standardization processing on the rules to generate a rule set with a complete and uniform structure; the step of constructing the rule tree is to process all rules to generate a tree data structure that is organized, stores all rule information and is easy to be retrieved quickly; and the step of matching the data packet comprises: 1. parsing the data packet to be matched to obtain data packet features; 2. performing retrieval matching on each feature of the data packet one by one according to theconstructed rule tree to finally match a certain rule; recording a matching count and a backtracking count; and 3. executing a policy set by the matched rule, or, executing a default policy if the rule is not matched. The invention provides a firewall data packet matching algorithm having excellent performance and controllable space complexity and friendly supporting the increase and decrease ofthe rules.