179 results about "Reaction path" patented technology

A linear actuator comprises rotary motion producing means (1,2,3,4,5); linear motion producing means (6,7,10,11,12) coupled with the rotary motion producing means for converting rotary motion to linear motion; a driven member (18) movable linearly by the linear motion providing means from a first position to a second position; and backdrive means (22) for returning the driven member to the first position. The arrangement is such that the linear motion producing means includes torque reaction means (13,15,16,17) which, in normal operation, is in an activated condition and provides a torque reaction path to enable the driven member to be moved from the first to the second position but which, in the event of a fault, is in a de-activated condition so that it no longer provides the torque reaction path and the back-drive means can move the driven member to the first position, without disengaging the rotary motion producing means from the linear motion producing means.

The invention provides a Co3O4 nano hollow sphere material and a preparation method and the application thereof. The preparation method of the Co3O4 nano hollow sphere material comprises the following steps of: mixing cobalt salt, surface active agent, precipitant with water according to stoichiometric ratio; putting mixed solution into a reaction kettle to perform hydro-thermal reaction, washing and drying to obtain a powdered mixed precursor; and heat treating the precursor in air to finally obtain the Co3O4 nano hollow sphere material. The obtained Co3O4 nano hollow sphere material has a regular surface nano piece layer and an internal hollow network structure, has a better electrochemical behavior, can be used for a cathode of a rechargeable lithium ion battery, can guarantee the electrolyte to be sufficiently permeated, can provide more electric active points with an increased contact surface, guarantees the lithium ion to better perform an embedding/withdrawing electrochemical behavior, enlargers the specific surface area, and improves the lithium storage capability. The internal network structure also shortens the reaction path of the lithium ion, i.e. shortens the conduction path of the e-and the Li+, thereby improving the characteristic of multiplying power.

The invention relates to a computer software security test method, and in particular relates to a dynamic and static combined software security test method. The test method comprises the following steps: firstly carrying out disassembly and intermediate language transformation on an executable program so as to generate a function call graph (CG) and a control flow graph (CFG) of a file; finding out a vulnerable point of a system by means of static analysis of the function CG, and constructing a test case generation execution path by virtue of a dynamic analysis method; searching a called function based on the function CG, finding out a specific path for triggering the vulnerable point on a first-grade basic block according to the CFG if the function is located on the generated execution path, and then ending the loophole mining process corresponding to the sensitive point; and if the path can not be found, reconfiguring the test case generation execution path and then searching the called function in a cyclic manner. The dynamic and static combined software security test method has the advantages of better solving the problem of path state space blast caused by single Fuzz dynamic test, and greatly improving the path coverage hit rate and the software test analysis efficiency.

The invention discloses a production technology of an environment-friendly medium-density fiberboard. The finished product is prepared by the steps of raw material chipping, proportioning, steaming, waxing, hot grinding, gluing, drying and winnowing, laying and forming, pre-pressing, final trimming, hot pressing, flap cooling, trimming and sanding, wherein the gluing step comprises a glue preparation technology, wherein formaldehyde and urea are used as main raw materials; the urea is added three times; and after urea is added each time, the molar ratio of the formaldehyde to the total quantity of urea is (2.4-3.0):1, (1.3-1.5):1 and (0.8-1.0):1, respectively. The glue preparation technology adopts a weak base-mediate strong acid-weak base reaction path, so that the raw materials sequentially react in three media with pH being 8.0-8.5, 2.5-3.5 and 8.0-8.5, respectively, and finally the urea resin adhesive level MDF_E1 is obtained. Through the production technology of the medium-density fiberboard, disclosed by the invention, an effect of reducing formaldehyde release amount can be reached without adding additives to the hot grinding technology or performing post-ammonia water treatment.

The invention discloses a distribution method for the passenger flow of the urban rail transit. The distribution method comprises the steps: (1), setting up a revealed preference survey and a stated preference survey; (2), searching for the effective path from an origin station to a destination station; (3), calculating the service quality score of each path according to the survey data and historical data of urban rail operation; (4), setting up the utility function of going out of selection paths of passenger groups, and standardizing coefficients of all influence factors of the utility function of passenger path selection according to the survey data; (5), applying a mixed strategy game model solution Nash equilibrium solution method to calculate the optimal path selection probability distribution of each group; (6), calculating the passenger flow distribution proportion of each path according to the group path selection probability and the proportion of each group of a survey sample; and (7), obtaining the distribution proportion table of ticket business income of operators of all paths through calculation according to the passenger flow distribution proportion of each path between origins (O) and destinations (D) of a road network. The distribution method has the advantages that the subjective initiative of passengers is fully considered, the game model of the passenger groups is set, the path selection behavior of the passengers in the urban rail transit can be simulated well, and accurate and effective ticket business distribution proportion data can be provided for running enterprises.

The invention discloses a perfluoro nitrile preparation method. The perfluoro nitrile preparation method comprises the following steps: an addition reaction is performed on perfluoroolefine R1R2C=CR3R4 and carbonyl fluoride to obtain acyl fluoride R1R2(COF)C-CFR3R4(the general formula of R1,R2,R3 and R4 is -CnF(2n+1) group, and n is a nonnegative integer set); b, performing a reaction on acyl fluoride R1R2(COF)C-CFR3R4, acyl fluoride and an alkali metal amide or an amino compound R-NH2(R is Li, Na, K, Rb, Cs or -CmH(2m+1) group, and m is a nonnegative integer set) to obtain amide R1R2(CONH2)C-CFR3R4; and c, performing a dehydration reaction on amide R1R2(CONH2)C-CFR3R4 to obtain perfluoro nitrile R1R2(CN)C-CFR3R4. The perfluoro nitrile preparation method has a short reaction path, can easily obtain perfluoroolefine and carbonyl fluoride, is low in cost and high in overall yield of perfluoro nitrile, and the reaction path is easy to industrialize.

The invention relates to a geological carbon dioxide storage evaluating method. The geological carbon dioxide storage evaluating method comprises the following steps: S1, selecting a core sample, anddetermining the characteristics of the core sample; S2, pretreating the sample: cutting the core sample, and polishing the surface of the cut core sample; S3, performing an indoor water-rock simulation experiment on the core sample; S4, treating the core sample after the experiment to remove a solution after an experimental reaction; S5, analyzing and testing the core sample treated after the experiment; S6, carrying out a long-term numerical simulation experiment. According to the geological carbon dioxide storage evaluating method, the reaction path and the reaction process after an oil andgas reservoir is filled with CO2 are determined through the short-term indoor water-rock simulation experiment, and on this basis, storage quantity evaluation is performed through long-term numericalsimulation, so that a CO2 filling simulation process is closer to an actual large-scale carbon dioxide filling experiment, uncertainty of the storage quantity evaluation caused by speculation of the storage process after CO2 filling according to a typical chemical reaction equation is avoided, and the accuracy of the storage potential evaluation of an actual storage geological body is significantly improved.

The invention discloses a device for treating electrophoretic coating waste water. The device comprises a waste liquid regulating pool, a waste water regulating pool and a reaction tank, wherein a pH probe is arranged in the reaction tank; the reaction tank is also connected with an alkali addition pipeline, and is sequentially divided into four reaction chambers, namely a first reaction chamber, a second reaction chamber, a third reaction chamber and a fourth reaction chamber, along a reaction path; a stirrer is arranged in each reaction chamber; the adjacent reaction chambers are communicated with each other through an overflow hole; a discharging port for waste water overflow is formed in the fourth reaction chamber and is connected to an inclined pipe precipitation tank; and a sludge discharging port is formed in the bottom of the inclined pipe precipitation tank, and is connected to a sludge pool. A method for treating the electrophoretic coating waste water mainly comprises the steps of mixture of waste liquid and waste water, phosphorous removal through calcium salt, nickel removal through vulcanization, phosphorous removal through ferric salt, and flocculating settling. According to the device and the method, heavy metal ions such as nickel and zinc in the waste water can be effectively removed, the labor intensity of an operator is reduced, and a system can also stably operate.

The invention provides a preparation method of levetiracetam (I). The method comprises the steps that racemization 2-halogenated butyric acid methyl ester which is in low in cost and easy to obtained is used as a raw material, a biological enzyme method is adopted to synthesize key chiral intermediate (R)-2-halogenated butyric acid methyl ester, the intermediate is subjected to ammonolysis and cyclized with 4-chlorobutyryl chloride, and finally the levetiracetam is obtained. The chiral center is built by the adoption of the enzyme asymmetric catalytic technology, a reaction path is directly reduced to three steps, the comprehensive yield is high, and the cost is low. Compared with a chemical catalyst, a biological enzyme catalyst has the advantages of being high in enantioselectivity and regioselectivity and low in energy consumption, producing few by-products and the three wastes, and the like.

The process of preparing 2, 4-dichlor fluorobenzene includes the following steps: 1. chloridizing parachloro nitrobenzene with chlorine to produce 3, 4-dichloro nitrobenzene; 2. dissolving 3, 4-dichloro nitrobenzene in solvent, and heating to produce fluoro reaction in the presence of catalyst to produce 3-chloro-4-fluoro nitrobenzene and potassium chloride; and 3. reacting 3-chloro-4-fluoro nitrobenzene and chlorine while heating and in the presence of catalyst to eliminate nitro group and produce 2, 4-dichlor fluorobenzene and nitro acyl chloride. The present invention has reasonable reaction path, cheap facile material, low cost, high reaction selectivity, high product quality and high safety.

The invention discloses an organic waste gas purifying device and method. The method comprises the steps that dust particles in waste gas are gathered and separated; high-energy electrons generated by discharge of flowing light and pollution gas molecules collide, and chemical bonds in the molecules are broken and activated; ultraviolet light radiates a nanometer titanium catalyst to generate multiple free radicals and electron holes, and organic waste gas is oxidized and decomposed. By the adoption of needle array positive direct current flowing light discharge, energy density of corona discharge is increased, and more high-energy electrons with high activity can be generated to carry out activating decomposition on the organic waste gas molecules. By means of the synergistic effect of precious metal and the manganese dioxide catalyst, the reaction path is changed, the reaction activation energy is reduced, organic waste gas is promoted to be thoroughly oxidized into dioxide carbon and water, and intermediate products are reduced. Nanometer titanium dioxide generates photos and the electron holes under radiation of ultraviolet light, and then particles with high oxidability of hydroxyl, oxygen free radicals and the like are formed, and subjected to the photochemical oxidation reaction with pollutants.

The present invention relates to new technological process of converting carboxylic acid into thiocarboxylic acid, and is especially synthesis process of fluticasone acetate. The present invention prepares fluticasone acetate with medicinal level flumethasone as initial material and through one of six technological paths, and has the advantages of short reaction path, high yield, simple reaction condition, high product purity, low cost, etc.

The present invention discloses a novel engine controlled by combustion reaction path, which cylinders comprise working cylinders and reforming cylinders. According to the operational condition of engine, the engine is used for compressing, heating and reforming the fuel injected from the reforming cylinder injector; by controlling the reaction boundary conditions between fuel and air, the reforming cylinder can exhaust partial intermediate products or oxidation products of the different oxidation stages; the products are then mixes with the inlet air in the pre-mixing chamber and then is introduced into the working cylinder. Under operating in different working conditions, the engine can discharge the mixed gas with different activities under different oxidation stages by regulating the corresponding boundary conditions of the reforming reaction of the reforming cylinder, and can achieve concentration stratification and activity stratification of the mixed gas in the working cylinder by using the fuel injected from the working cylinder injectors, and can effectively achieve high effectiveness and broaden the scope of clean combustion by changing the combustion reaction path. The present invention just adopts simple oxidation reaction post-treatment device, and then the emission of the engine can meet the requirement of EuroVI emission regulation.

The invention discloses a method for selecting the optimal emergency medical care reaction path in comprehensive consideration of rescuing materials and region rescuing importance. According to the method, a region system to be rescued is divided into multiple region points Qp, then information parameters of all the region points Qp are collected, the shortest distance dpq between different regions is processed into the reference quantity Spq of time in a normalization mode through corresponding different speeds vpq, the minimum rescuing time Tmin of all paths is solved, then time Tmin of all the paths is compared with regulated time tao for reaching the rescuing place to obtain all rescuing schemes F{F1, F2, F3,...Fs} under the condition that the number of the rescuing materials is m, and in comprehensive consideration of sufficient rescuing materials, insufficient rescuing materials and importance difference of regions, the optimal emergency medical care path and the selected site of the rescuing materials are provided. In this way, the rescuing capacity and efficiency of different regions are improved.

The invention discloses an amphipathic polysaccharide/polypeptide block polymer containing azobenzene group and preparation method and application of the block polymer. The amphipathic polysaccharide/polypeptide block polymer containing azobenzene group is prepared through click chemistry reaction path by using glucan as a hydrophilic chain segment and using poly-L-glutamate as a hydrophobic chain segment. The contained glucan chain segment is a water-soluble natural polysaccharide with good biocompatibility and biodegradability, the contained poly-L-glutamate chain segment is of a proteoid structure and has good biocompatibility and biodegradability. The preparation condition is mild, efficient and practical, the prepared amphipathic block polymer containing azobenzene pendant group has a capability of forming nano-micelle in the water solution; and meanwhile, the formed micelle has an ultraviolet response capability and can be used as novel drug carrier with excellent performance and light-operated drug release function.

It is micro-path array biological chip by use of photon particle code, which is a high-flux detection chip for multiple proteins and genes in the biology sample. The photon crystal micro ball 3 of the chip is located with probe molecule and distributes on the designed order in the micro path 1 with sample-in mouth 2 and sample-out 4, wherein, the sample-out mouth has a smaller radium than that of sample-in mouth and blocks the photon particle in the micro path 1. When in use, it separately connects multiple-position sample valve 5 with sample-in mouth 2 and sample-out mouth 4 through micro peristaltic pump 6 and T shaped pipe 7 to form a seal cross-breed reaction path.

The invention discloses a method for predicating a catalytic reforming product. The method comprises the steps of acquiring all components of a catalytic reforming raw material and a content which corresponds with each component; establishing reaction rules based on the types of modular structures of all components in the catalytic reforming raw material; generating a reaction network according tothe plurality of reaction rules and all the components of the catalytic reforming raw materials, wherein the reaction network comprises a plurality of nodes and a plurality of directional sides, thenode represents the component of the catalytic reforming raw material, an intermediate product or a final product, and the directional side represents the reaction path between two members in the catalytic reforming raw material, the intermediate product and the final product; setting the reaction conversion rate which corresponds with each reaction path and the reaction depth of the catalytic reforming raw material in a reactor, and establishing a catalytic reforming product predicating model based on the reaction network, all components of the catalytic reforming reactant and the content which corresponds with each component; and based on the catalytic reforming product predicating model, acquiring all the components of the catalytic reforming product and the predicated content which corresponds with each component.

The invention discloses a method for researching an oryza sativa and pathogen interaction mode, and belongs to the field of plant biotechnology. The method for researching the interaction mode of oryza sativa in response to pathogen infection through integrated application of a transtriptome, a proteome and a miRNA group comprises the concrete steps: A, respectively taking oryza sativa leaf blade total RNAs, Small RNAs and total proteins of a disease-resistant material and a susceptible material at different time points before and after pathogen inoculation; B, respectively carrying out differential-expression spectrum analysis, differential proteomics analysis and miRNA identification and target gene analysis; and C, integrating and associating differential genes, proteins and miRNA target genes identified by the three ways, to reveal disease-resistant and susceptible reaction paths activated or inhibited in the oryza sativa and pathogen interaction process, so as to relatively systematically illuminate an oryza sativa-magnaporthe oryzae interaction mechanism. The method can quickly and effectively screen candidate genes associated with oryza sativa disease resistance.

The invention discloses an Al-Si-Ti ternary active solder for an aluminum-based composite material and a preparation method thereof. The solder comprises the following components in percentage by mass: 7 to 14 percent of Si, 0.1 to 1.2 percent of Ti and the balance of Al. During soldering, the solder is appropriately pressurized after being preset and is heated to about 610 DEG C. Compared with the conventional Al-Si eutectic solder, the Al-Si-Ti ternary active solder has the advantages that: (1) a ceramic reinforced phase micro zone can be well wetted through reaction between a liquid activeelement Ti and a ceramic reinforced phase, so that a residual air gap between the ceramic reinforced phase and the solder is eliminated; (2) an aluminum matrix micro zone is free from a soldering flux and cleaning after soldering, wherein the solder breaks an oxidation film through a metallurgical reaction path, namely through reaction between the active element Ti and the oxidation film on the surface of an aluminum matrix, so that an interfacial air gap is eliminated in advance, and a diffusion channel is quickly established to make wetting and Si penetration performed in advance; (3) the solder has a compact interface and short required soldering time; (4) ceramic particle segregation is avoided; and (5) the solder has high applicability, is particularly suitable for the aluminum-basedcomposite material taking aluminum oxide as a reinforcing phase and the aluminum-based composite material with high volume fraction.

Provided is a method for preparing cyhalofop-butyl. The method comprises the steps that (R)-2-(4-hydroxyphenoxy) propionic acid and 3,4-difluorobenzonitrile are subjected to an etherification reaction under the alkaline condition to obtain an (R)-2-[2-fluorine-4-cyano]-phenoxyl]-propionic acid intermediate, and then the (R)-2-[2-fluorine-4-cyano]-phenoxyl]-propionic acid intermediate and normal butanol are subjected to an esterification and dehydration reaction to obtain a cyhalofop-butyl product. According to the method for preparing cyhalofop-butyl, the reaction path is shortened, the production cost is reduced, the acylating chlorination step is omitted, the requirement on equipment is lowered, operation is simplified, the emissions of three wastes are reduced, and great guiding significance on process amplification and production is achieved.