938results about How to "Obvious superiority" patented technology

The invention relates to a key management and recovery method for an encrypted digital certificate. When a certificate issuing system based on the method issues an encrypted certificate of a user, a specific certificate public key recovered by a key is used for encrypting a private key of the user and then the private key encrypted is put into a newly defined private key recovery extension item in the certificate; when the encrypted private key of the user is damaged or lost, a key recovering system or tool can recover the private key of the encrypted certificate of the user by using a corresponding certificate private key for recovering the certificate and safely send the private key of the encrypted certificate to the user according to necessary private key recovering strategies after necessary user ID confirmation is finished. On the basis of the method, the private key of the user can be recovered in both online and offline manners. Compared with the commonly adopted key management and recovery method for an encrypted digital certificate currently, the invention does not require a special system to collectively store the private of the encrypted certificate of the user, which greatly lowers the complexity of key management and recovery system and causes the private key recovery to become easy, simple and flexible.

The catalytic cracking co-catalyst for increasing diesel oil yield is prepared through roasting kaolin at over 900 deg.c for in-situ crystallization. The co-catalyst contains type-Y zeolite in 5-20 wt%, as well as magnesia 0.5-3 wt%, RE oxide 0.5-5 wt%, and sodium oxide less than 0.6 wt%, and the zeolite has Si/Al ratio of 4.0-6.0. Adding certain amount of the catalytic cracking co-catalyst without altering the main catalyst in the oil refining apparatus can raise diesel oil yield of FCC catalyzed apparatus, improve product distribution, raise available catalyst utilization, and improve the activity stability of the catalyst system and heavy metal resistance.

The invention relates to a vehicle intersection collision early warning method. Firstly, the position, direction, track radius, speed and acceleration information of a local vehicle and a target vehicle is collected; the driving trajectories and the collision point of the local vehicle and the target vehicle are calculated according to the position, direction and track radius information, and a collision area is calculated according to the collision point; whether the time from driving into the area to driving out of the collision area of the local vehicle and the time from driving into the collision area to driving out of the collision area of the target vehicle are overlapped or not is judged, when the two times are overlapped, the time T needed by the driving into the collision area of the local vehicle with a current speed and acceleration is calculated, and if the time T is smaller than a set value, the early warning result of alarm is executed. According to the scheme, the problems that a collision position is not accurate, the estimated time deviation of arriving an intersection is large and a lot of wrong alarms exist in the prior art are solved.

The invention provides a method for high-efficiency task scheduling of a heterogeneous multi-core processor. The method comprises the following steps of: clustering certain special tasks which are large in communication overhead and easy to cluster in a task image to a precursor node of the tasks by adopting a linear task clustering method; starting from a topological structure of the whole task image, selecting parameters capable of comprehensively reflecting the importance of the task in the whole task image as priority weights; selecting a free critical path node to perform allocation first, and if multiple free critical path nodes exist, allocating the free critical path nodes in a sequence from high to low according to the node priority weights, and allocating all non-critical path free nodes in a sequence from high to low according to the priority weights; performing redundancy judgment, and deleting redundant tasks in a scheduling result; and performing adjustment according to the scheduling result after deleting the redundant tasks, and recalculating the earliest finish time of each task. According to the method, the efficiency of the task scheduling of the heterogeneous multi-core processor is improved, the power consumption of the processor is reduced, and the performance of the multi-core processor is promoted.

The invention discloses a segment assembled simple box girder movable trestle construction method. The required construction simple box girder has single hole or multiple holes, and is assembled by a plurality of longitudinal (i.e. along bridge direction) segment box grinders; the method comprises the following steps: prefabricating all the segment box girders for assembling the simple box girder in concentration; assembling and erecting the first hole grinder, which comprises the steps of: assembling and erecting the trestle (i.e. assembling platform), hanging the segments on to the assembling platform according to the assembling sequence and adjusting the arch degree, line style and position accurately, constructing the segments on the assembling platform by segment assembling construction technology until complete the whole hole grinder construction, and dismounting the trestle and moving to the next hole grinder; and performing the subsequent hole grinders in order according to the construction steps of the first hole grinder. the invention achieves the advantages of simple steps, low construction difficulty, short construction cycle and low onetime fund investment; can solves the practical problems existing in the segment assembling construction process of current large-span bridge fabrication machine.

The invention relates to a novel solid heterogeneous catalyst for hydroformylation of olefins, a preparation method and an application thereof and relates to a solid heterogeneous catalyst applied in hydroformylation of olefins. The solid heterogeneous catalyst is composed of a metal component and an organic ligand polymer, wherein the metal component is one or more selected from metallic Rh, Ir or Co; the organic ligand polymer is a polymer which is generated by polymerization of an organic ligand monomer containing P and alkylene and optional N by a solvothermal polymerization method and has large specific surface area and hierarchical porous structure; and the metal component reacts with P atom or N in the organic ligand polymer skeleton to form a coordinate bond and the coordinate bond exists in the state of single atomic dispersion. In hydroformylation of olefins, an intermediate active species which is similar to a homogeneous catalyst is generated in situ due to coordination between the metal component and P and/or N atom. The catalyst provided by the invention has excellent catalytic performance, is easy to separate and has high stability.

A box culvert pushing construction method integrating comprehensive grouting, pressure maintaining and pipe roof support is characterized in that a box culvert is pushed under the pipe roof support on a culvert pushing construction working surface, and simultaneously, comprehensive grouting, lubrication, friction reduction and pressure maintaining measures are taken to control pavement sedimentation. The construction method comprises the steps of pushing the box culvert under the pipe roof support, performing the comprehensive grouting in places, forming a pressure maintaining lubrication film around a box culvert pushing body, and micro-controlling grouting under the pavement to reduce the pavement sedimentation. The method has the benefits that the pipe roof support, comprehensive grouting as well as pressure maintaining and lubrication measures are added in the construction method based on a common culvert pushing method; the prefabricated box culvert is pushed under the protection of a pipe roof; the whole construction process integrates underground water sealing, temporary tunnel face reinforcing and ground elevation micro-control measures; crossing construction can be accomplished under the condition that normal traffic of an expressway is ensured; land requisition and side rod construction expenses are not required to be increased; the risk and construction cost are low; the construction period is short; compared with the prior conventional culvert pushing technology, the method shows good superiority.

The present invention is efficient ecological waste water treating apparatus and method. The apparatus consists of grit contacting oxidizing area, vertical upstream flow artificial wet land area, aerating jet area and horizontal flow artificial wet land area connected serially. The present invention has the advantages of composite medium in new recipe resulting in excellent phosphate and organic matter eliminating effect, the grit contacting oxidizing resulting in the long term stable running of the system, the composite of vertical upstream flow artificial wet land and horizontal flow artificial wet land resulting in raised effective volume and the aerating jet creating condition for aerobic degrading of organic matter.

The invention belongs to the field of chromite hydrometallurgy and chromium chemical industry, and in particular relates to a method for the pollution-free production of sodium chromate by pressure leaching of chromite. The method comprises the following steps of: 1) reacting the chromite with oxidizing gas in solution of NaOH; 2) diluting the product obtained by the step 1) and making subcrystalline sodium chromate to fully enter a liquid phase; 3) performing solid-liquid separation on the solid-liquid mixed slurry obtained by the step 2); 4) adding calcium oxide into the obtained diluent for removing impurities; and 5) evaporating and crystallizing the obtained solution without the impurities to obtain a sodium chromate crystal and crystallization mother solution; after the solid-liquid separation, rinsing the sodium chromate crystal by using saturated solution of sodium chromate; and drying to obtain a qualified sodium chromate product. The method has the advantages of simple reaction system component, no difficultly separated phase introduced in the system, contribution to high-efficiency separation of the sodium chromate, great reduction in reaction temperature, low energy consumption, effective reduction in production cost of the sodium chromate, and high chromium leaching yield.

The invention relates to a method for removing organic pollutants in water at an ultrahigh speed. The method comprises the following steps: firstly, adding a reducing agent to water to be treated; secondly, adjusting the pH value of the water to be treated to be within the range of 3-7; thirdly, adding an oxidizing agent to the water to be treated. According to the method, bisulfite radicals are utilized for reacting with potassium permanganate or manganese dioxide, the removal of the organic pollutants in the water at the ultrahigh speed is realized by quickly generating a highly active oxidizing agent Mn(III) (at a non-complexing state), the rate of removing the pollutants by potassium permanganate and manganese dioxide can be improved by one thousand to one million times and is ten thousand times higher than the apparent oxidation rate of a general advanced oxidation technology, and the degradation for the pollutants can be completed in ten seconds or several seconds. According to the method, the pollutants incapable of being oxidized by potassium permanganate and manganese dioxide can also be oxidized, and even nitrobenzene capable of being oxidized by hydroxyl radicals only in traditional meanings can be oxidized, so that the oxidizing capacity of potassium permanganate and manganese dioxide is greatly improved, and the application range of potassium permanganate and manganese dioxide is expanded.

The invention provides a progressive repair method for soil polluted by chlorinated organic compounds. The repair method comprises the following steps: leaching the organic polluted soil by a water solution containing a bio-surfactant, and distributing most of persistent organic pollutants in the soil into a leaching solution; after finishing leaching, adding microbial degrading bacteria, and realizing the sustainable degradation of low-concentration organic compounds. The residual bio-surfactant cannot perform a negative function on the subsequent biodegradation of the organic pollutants, and can be used as a carbon source and be utilized by microorganisms. The bio-surfactant is used as a leaching agent, the organic pollutants are progressively degraded by a microorganism process, and the problems that the soil polluted by high-concentration chlorinated organic compounds is difficult to repair, traditional bio-surfactant produces residual toxicity, and the like are solved.

The invention provides a method for extracting alumina from coal ash through a wet process. The method comprises the following steps: 1, mixing the coal ash, calcium oxide and an alkaline solution, reacting, carrying out flash evaporation, and filtering to obtain an alkaline solution containing sodium aluminate and aluminum removed slag; 2, cooling and crystallizing the alkaline solution obtained in step 1 to obtain a coarse hydrated sodium aluminate crystal and a crystallization mother solution; 3, circulatingly applying the crystallization mother solution obtained in step 2 to a leaching reaction, dissolving the coarse hydrated sodium aluminate crystal with water or a diluted alkaline solution, carrying out silicon removal and seed decomposition to obtain aluminum hydroxide, and calcining aluminum hydroxide to obtain alumina; 4, evaporating the seed-decomposed mother solution, and mixing the evaporated seed-decomposed mother solution with the alkaline solution obtained in the step 1; and 5, carrying out hydrolysis sodium removal on the aluminum removed slag obtained in the step 1 in the diluted alkaline solution, filter-separating, and carrying out multistage countercurrent washing on the sodium removed slag. According to the method, the dissolving-out temperature and the dissolving-out pressure are low, the dissolving-out rate of alumina can reach above 90%, and the content of sodium oxide in the sodium removed slag is less than 1%.

The invention relates to a preparation method of a graphene nano-fiber and super-capacitor application of the preparation method of the graphene nano-fiber. The preparation method of the graphene nano-fiber includes the following steps: (1) an electrostatic spinning method is utilized to prepare a polymer fiber; (2) the polymer fiber obtained by the method is conducted with stabilizing treatment in appropriate temperature and in an oxygen-bearing atmosphere; (3) the fiber after the stabilizing treatment is conducted with carbonization thermal treatment in an NH3-bearing atmosphere and in appropriate temperature. The surface of the prepared graphene nano-fiber is provided with a graphene sheet which grows along the radial direction, and the thickness of the graphene sheet is 1 to 10 atomic layers. The graphene nano-fiber integrates the advantages of graphene and carbon nanofibers, solves the problems of graphene agglomeration and recrystallization, is high in surface activity and has various application values. The graphene nano-fiber is utilized to serve as a super-capacitor of electrode material preparation. Therefore, compared with the prior art, the preparation method of the graphene nano-fiber and the super-capacitor application of the preparation method of the graphene nano-fiber have good performance. The working voltage reaches 1.8-2.2 volts; the energy density reaches 41.3 watt hour/kilogram; and the specific capacitance in acid can reach 300 F/g.

The invention belongs to the field of performance improvement of processors and particularly relates to a dependent task scheduling method of a heterogeneous multi-core processor. The method comprises the following steps: (1) calculating a task priority; (2) selecting a processor; and (3) scheduling and optimizing. According to the dependent task scheduling method, tasks are distributed into a processor inner core by taking executing time of a backward key path as a weight under a current structure so as to overcome the disadvantage of an existing scheduling method that a greedy thought selection processor inner core is commonly adopted to cause locally optimal solution; the whole minimum finishing time of a task pattern is obtained by considering an overall situation; and a task executing length is shortened in the scheduling process so that the utilization rate of the processor is improved. The method provided by the invention and the existing scheduling method are subjected to an instance analysis and a simulation experiment to test and verify that the task scheduling efficiency of the method is improved by about 18.3% when being compared with that of the previous method; when the quantity of tasks and the quantity of the processor inner cores are increased, the superiority of the method is more highlight; and the finishing time of the task pattern is shortened and the utilization rate of the processor is improved.

The invention relates to a method for preparing a ceria/monox compounded abrasive, and application of the compounded abrasive. The method uses monodisperse spherical monox as a kernel of a coating type compounded abrasive, hexamethylenetetramine (HMT) as a precipitator and cerium salt as a raw material, and adopts an even precipitation method process to synthesize the ceria/monox compounded abrasive. Through the optimization of process parameters, such as the use amount ratio of monox master particles to the cerium salt, the molar ratio of the HMT to the cerium salt, and reaction and calcination temperature, the method controls the covering amount, the shape and the distribution state of ceria particles on the surface of the monox, thereby preparing the ceria/monox compounded abrasive of which the nanometer-level ceria particles evenly cover on the surface of the monox and which has good monodispersity; the method does not need complex equipment; and the needed chemical materials have less varieties, cheap prices and good experiment repeatability. The ceria/monox compounded abrasive is prepared into polishing slurry for chemical mechanical polishing of a gallium arsenide chip so as to obtain the polishing surface with the roughness in sub-nanometer magnitude and further improve polishing speed, reduce polishing pass and improve efficiency.

The invention discloses a multi-axle steering vehicle large curvature automatic driving and steering control method. The multi-axle steering vehicle large curvature automatic driving and steering control method comprises the steps that S1, a transverse deviation Ye(t) and a first course angle deviation Phi<h>(t) of a vehicle at a current position are obtained, and a transverse deviation Y(t) and asecond course angle deviation e(1, t) of the vehicle at a preset preview point position are calculated; S2, an estimator Xi<f> of a front wheel turning angle of the vehicle is calculated; S3, the estimator Xi<f> of the front wheel turning angle is treated as feedback of the second course angle deviation e(1,t), and a course input deviation e' of the vehicle is calculated; and S4, an expected front wheel turning angle u of the vehicle is calculated according to the input deviation e', and vehicle steering is controlled. The multi-axle steering vehicle large curvature automatic driving and steering control method has the advantage that the front wheel turning angle is treated as the feedback course of a decision controller, a ''wheel returning'' measure adopted by a driver when the driver drives the vehicle to pass through a sharp curving route is simulated accordingly, the control performance of the controlled vehicle is better than a conventional control method when the controlled vehicle turns a corner with a large curvature radius, in addition, with increasing of the deviation, the superiority is more obvious.

The invention relates to a quick preparation method for a graphene oxide film, which comprises the following steps: taking crystalline flake graphite powder as a raw material, taking a piece of plain glass as a film-forming carrier, taking sulfuric acid, sodium nitrate, potassium permanganate and hydrogen peroxide as materials used in a preparation process, taking deionized water as a solvent and taking nitrogen as a protection gas; firstly, preparing a graphene oxide solution in a four-hole boiling flask and using a salpeter solution to flocculate the graphene oxide solution; and then forming a film on the plain glass; and vacuum-drying the film, thereby acquiring the graphene oxide film. The graphene oxide film is 1-2 mu m in thickness and has high strength and excellent toughness as well as excellent breaking strength resistance. The quick preparation method has the advantages that the process flow is short, the speed is high, the operation is simple and the mass production can be realized. The prepared film can be applied to carriers of paper battery and fuel battery catalysts. The quick preparation method is an ideal method for quickly preparing the graphene oxide film.

The invention discloses a novel vector encryption authentication mechanism and relates to a vector cryptography method, belonging to the technical field of information security. The method comprises the following steps: a cipher system selects a large number encryption key space M which is twice divided into 2*2 encryption key subspaces which are provided with 2 vectors with different orientations in order that each cipher system of the system possesses a unique encryption key subspace and a unique decryption key subspace; according to the method, the novel vector encryption authentication mechanism can be constructed; the mechanism adopts a hardware tamperproof encryption key generation/regeneration technology to realize the secondary division of the large number encryption key space and endow the encryption key with vector property; and the mechanism adopts a dissymmetrical symmetric algorithm array for encryption/decryption, thereby realizing high strength security, anti-replay, integral control, identity authentication and digital signature and having no problem of the management of the encryption key.

The invention field emitting cathode is a metal nano wire array which grows on metal base of planar electrode and the metal is same as the base's. The thickness of base is 1 micro m to 0.5 mm, the diameter of nano wire is 20-200 nm, the length is 100 to 500 nm. The producing steps are: to select modular board with nanometer holes according to size requirement of display unit, to make a metal filmelectrode on a surface of the selected modular board by evaporating and electroplating, to electrochemical grow metal nanometer wire array in the nanometer holes of nanometer modular board, to clean and dry the dissolved part or whole modular to expose metal nanometer wires. It can be used to cathode-ray tube and plate display, and has low beginning field strength for field emitting cathode, highcurrent density and low cost.

This invention relates to the person and object safety. A info emitter with the inner wireless LAN chip attaches on certain person or object and emits timely the wireless info with a special coding (WISC). A handset carried by the supervisor alarms and awakes the supervisor as soon as it cannot receive WISC. Several handsets can connect together via public net to search the lost person or object. This method is efficient and operable and costs low.

The invention discloses a target tracking method based on local feature learning. A target object and background are resolved into a large number of local units having dimension and shape invariance which serve as training samples of a target and background classification model, and a mode of deep learning is adopted to learn local expression of the target object and background from the training samples. The degree of confidence that each specific area in an image belongs to the target object is judged, thereby realizing accurate positioning of the target object. Since local expression obtained by learning of a large number of samples has a high target identification capability, the tracking method has relatively high adaptability to situations such as target deformation and target occlusion. When an object appearance model is updated, local areas with a relatively high target confidence degree are extracted as training samples of the model, and the model is updated. In the process of target tracking, the method continuously updates the appearance model, learns key characteristics of the target object, and can obtain a relatively good tracking effect under the circumstance that an appearance change is relatively big.

The invention provides a test device and method for judging soil layer collapsibility. The test device comprises an outer sleeve, a push rod and a data processor, which are sequentially connected from a conical probe; a soil moisture detector and a stress sensor are arranged in the conical probe; the soil moisture detector comprises a load resistor and a moisture sensor and is used for detecting the water content in the soil body; the stress sensor comprises a strain gauge and a support column and is used for measuring the penetration resistance of the conical probe; and a water injection device is also arranged in the test device and used for simulating the critical water content in the strength test of a soil body. The test device provided by the invention is small in volume, is easy to operate and can be applied to the primary judgment of the loess collapsibility; the test device can primarily determine the interface between the collapsibility soil layer and the non-collapsibility soil layer and the thickness of the collapsibility soil layer without excavating or sampling the field oil layer, so as to determine the lower-limit depth of the collapsibility soil layer and further determine the sampling depth of the exploratory well in reconnaissance; and the test device has obvious superiority in large-area soil property investigation.

The invention discloses a zero sample learning method and system based on a semantic attribute attention redistribution mechanism, and the method comprises the steps: (1) building a neural network model based on the semantic attribute attention redistribution mechanism; (2) redistributing the weight between the semantic features by using the attention of the semantic attribute space; (3) traininga neural network model by using the image data set with the label; (4) calculating the similarity between the weighted semantic features of the images and the semantic prototypes of the unknown classes, calculating the similarity between the hidden layer features and the hidden layer feature prototypes of the unknown classes, and adding the two similarities to obtain the similarity between the test image and each unknown class; and (5) sorting according to the similarity with the types, and the type with the maximum similarity is selected as the type prediction of the image. According to the method, in the training process of zero sample learning, the semantic space and the hidden layer space can be more closely linked, and a joint classification result combining the two spaces is more robust.