Semantic matching algorithm of large scale issuance subscription system

The invention relates to the technical field of Web services, in particular to a semantic matching algorithm of a large-scale publish-subscribe system, which comprises the following steps: 1) an index is established for a subscription graph; 2) events are converted to a specific data structure; 3) the data structure of an event graph is submitted to an event matcher; and 4) the event matcher carries out the matching calculation of the event graph and the subscription graph mode, thus finding out the matching subscription and distributing the events to the matching subscribers by the system. The semantic matching algorithm can reduce the matching time of the events and the subscription, improve the matching efficiency of the events, allow the matching efficiency of the events not to be seriously affected along with the increase of the number of the subscription and publishing events and allow the performances of the system not to deteriorate. At the same time, the semantic matching algorithm ...

Preparation of metal deuteroporphyrin compounds and method of use thereof

The invention discloses a method for preparing metal deuteroporphyrin compound and an application method thereof. The method comprises the following steps: protohemin, hydroxyphenol and a spot of anhydrous aluminum chloride react under nitrogen protection, and then deuterohemin is obtained through washing and drying by using hot water; deuterohemin, concentrated sulfuric acid and methanol are added, and ultrasonic irradiation reaction is performed at room temperature; a reaction solution is extracted, and deuteroporphyrin dimethyl ester is obtained through recrystallization after the solvent is removed; deuteroporphyrin dimethyl ester is dissolved in chloroform, reflux reaction is performed by adding metal salt or oxide, the solvent is recovered through vacuum distillation, and the metal deuteroporphyrin compound is obtained through drying and recrystallization. When in application, the metal deuteroporphyrin compound is fixedly carried on a carrier, cyclohexane and metal deuteroporphyrin ...

Process for synthesizing 4,4'-diamino diphenylethene-2,2'-disulfonic acid

A process for synthesizing 4,4'-diaminodiphenyl ethene-2,2'-disulfonic acid includes such steps as sulfonating reacting where SO3 (raw material) replaces fuming sulfuric acid, oxidizing reacting withcomposite manganese sulfate catalyst, and hydroreduction reacting. Its advantages include no generation of waste acid, high output rate and utilization rate of equipment, high quality and low cost ofproduct and cyclic use of waste water.

Method for preparing polyethylene glycol-bridged neutral dicationic imidazole ionic liquid in one pot

The invention discloses a method for preparing polyethylene glycol-bridged neutral dicationic imidazole ionic liquid in one pot. In the process of preparing the ionic liquid, acid binding agent and solvent are first added, A is dripped in PEG under the ice-bath condition and then stirred, and N-alkyl imidazole is then added and stirred; solid is then filtered, product is washed by ethyl ether and then by petroleum ether or methylbenzene, liquid is separated, and organic solvent is removed by way of rotary evaporation. The operation of the preparation method is simple, the reaction time is shortened, and the reaction efficiency is effectively increased.

Preparation of polymer modified phase stable ammonium nitrate

The invention discloses a method for preparing polymer modified phase-stable ammonium nitrate. The method comprises the steps of synthesizing an organic polymer from styrene sodium sulfonate, acrylic ester, dimethyl diallyl ammonium chloride and butene diacid sodium by use of monomers, dissolving an organic monomer in water, stirring and heating the water, dripping initiator, preserving heat, heating, preserving heat, adding the synthetic organic polymer to a ammonium nitrate aqueous solution, heating the solution for dissolution, stirring the solution fast, naturally cooling the solution forcrystallization, drying crystals at a temperature between 50 and 80 DEG C and obtaining the polymer modified phase-stable ammonium nitrate. As the method adds the organic polymer to ammonium nitrate,and as the polymer is low in air permeability and excellent in film-forming property, a film is great in toughness and elasticity, high in strength, capable of bearing volume expansion caused by crystal ...

Puffing agent of ammonium nitrate

A puffing agent for ammonium nitrate is prepared from cationic surfactant (10-60 mass%), organic acid salt and aldehyde condensate as disperser (5-30), fatty acid or/and its metal salt (5-50) and organic hydrophobic agent (5-15) through mixing. It can obviously decrease the blocking and hydroscopic performance of ammonium nitrate, and improve its crystal variation power and sensitivity. Its advantages are simple process and low cost.

DEMOLITION DEVICE WITH LIQUID EXPLOSIVE

... 该液体炸药爆破器是由打孔装置、起爆装置和液体炸药三部分组为一体。适用于多种爆破工程，尤其适于用爆炸方式挖掘坑洞。打孔是利用枪械射击的高速固体或是利用聚能效应的高速流体实现的。起爆装置具有平时隔爆安全，使用时具有８－１２秒延期和起爆可靠的特点。液体炸药具有耐寒、爆速高、对枪击不敏感的优点。 ...

Light microporous ammonium nitrate mixture and its preparing process

Bulked ammonium nitrate explosive with low explosion speed and its prepaing process

A puffed ammonium nitrate explosive with low exploding speed is prepared from ammonium nitrate, surfactant, composite oil, wood powder, and diluent through dissolving ammonium nitrate and surfactant in water, vacuum drying at 110-140 deg.C and -0.085--0.098 MPa vacuity for 5-20 min, mixing with others and cooling. Its advantages are high safety and performance, uniform explosion transmission and low cost.

Method for preparing metacresol by directly hydrolyzing meta-aminotoluene

The invention discloses a method for preparing metacresol by directly hydrolyzing meta-aminotoluene. The method comprises the following steps: acid, meta-aminotoluene and water are made into a solution which is put into a reactor; nitrogen is introduced into the reactor; heating and stirring are carried out, so that the hydrolysis reaction is carried out fully; when the reaction is finished, the temperature is cooled to room temperature, the material is extracted by an organic solvent to obtain the metacresol crude product. The hydrolysis of the invention is carried out by one step or multiple steps of continuous reactions, the method is simple and practicable with low cost, the product of primary hydrolysis is removed, a plurality of hydrolyses of the mixture can improve the yield; after metacresol is extracted, the residual mixed liquor is added with reactant which are heated to hydrolysis temperature, and multiple times of hydrolysis reactions are carried out, which is capable of effectively ...

高性能粉状铵油炸药及其制法

A high-performance powdered ammonium-oil explosive is prepared from ammonium nitrate (89-97 wt.%), composite oil phase (2.8-7) and wood powder (0.1-4) through dissolving ammonium nitrate in water, mixing with composite oil phase at 80-120 deg.c, high-speed stirring to form oil-in-water system, pumping it in a vacuum container, vacuum drying, mixing with wood powder, and cooling. Its advantage is high exploding and water-proof performance.

Light microporous ammonium nitrate and its preparing process

Light microporous ammonium nitrate is obtained through modification of ordinary industrial ammonium nitrate by use of compound crystalline modifier and features more micropores, great specific surface area, not caking, and slower hygroscopicity. If it is used to make powdered nitramon explosive, the explosive has the advantages of high density, reliable detonation, and high explosion speed and power.

Technique for preparing m-cresol

A preparation technical of m-cresol is that: M-cresol is diazotizated, and hydrolyzed while at the same time steam is distilled to prepare a distilled m-cresol hydrolysis liquid. The distilled hydrolysis liquid passes through a N3520 type macroporous resin, and is eluded by organic solvent; the m-cresol product is obtained after rectifying. The invention adopts steam to distil m-cresol generated by hydrolyzation in time, which produces little byproduct tarry matter and increases the yield rate of m-cresol; preparation of product and treatment of waste water are carried out at the same time, which reduces the waste water treatment procedure and simplify the progress of preparation technology; because the invention adopts N3520 type macroporous resin to dispose the distilled m-cresol hydrolysis liquid, the m-cresol is easily desorbed with a fast desorption rate and a short reaction cycle, thus being beneficial to the recycle of m-cresol. The preparation technology of m-cresol of the invention ...

INDUSTRIAL MIXED EXPLOSIVES WITH LOW DETONATION SPEED AND ITS PREPN. METHOD

Sensitizing type expanded ammonium nitrate fuel oil explosive and preparation method thereof

The invention discloses a sensitizing type expanded ammonium nitrate fuel oil explosive and a preparation method thereof. The explosive is prepared by blending expanded ammonium nitrate and nitromethane, and the mass percentages are 66.3%-80% and 20%-33.7%; or the explosive is prepared by blending expanded ammonium nitrate, nitromethane and composite oil phase, and the mass percentages of expanded ammonium nitrate, nitromethane and composite oil phase are 84%-95%:1%-11%:4%-5%; or the explosive is prepared by blending expanded ammonium nitrate, nitromethane, composite oil phase and aluminium powder, wherein the composite oil phase is prepared by melting diesel oil and paraffin, and the mass ratio of diesel oil and paraffin is 6:4, and the mass percentages of expanded ammonium nitrate, nitromethane, composite oil phase and aluminium powder are 91%-94.5%:1%-3%:4-5%:0.5-1%. The invention adopts self-sensitizing expanded ammonium nitrate with multiple micropores, large specific surface area ...

One-step preparation method of bisphenol AF

The invention discloses a one-step preparation method of bisphenol AF. The method is as follows: firstly, HFA . 3H2O is added to phenol at room temperature to be stirred until most of the phenol is dissolved; secondly, a catalyst is added to the obtained mixture to carry out the reaction under the protection of nitrogen; thirdly, after the end of the reaction, the mixture is added with an organic solvent to be stirred and washed, and then is extracted by the organic solvent, and the organic phase is combined; and finally, the organic phase is neutralized by aqueous NaHCO3 and is dried, and the organic phase and the incompletely reacted phenol are removed by steaming to obtain the bisphenol AF. The invention can further obtain the bisphenol AF under the normal pressure, and prevents from using high-pressure or freezing devices and other special equipment, so that the operation conditions are mild, the reaction selectivity is good, and the yield is high; the used material HFA . 3H2O has stable ...

Synthetic method of nitrobenzene methyl aldehyde

The invention discloses a synthesis method of nitrobenzaldehyde. The synthesis method takes nitrotoluene as a raw material to prepare target product through bromination hydrolyzation oxidation and comprises the steps as follows: the nitrotoluene is reacted with a bromoagent and a catalyst in a reaction kettle; reaction liquid is poured into the mixture of ice and water to separate out crystal nitryl bromobenzyl; the nitryl bromobenzyl is hydrolyzed to obtain nitryl benzyl alcohol under alkali condition; an oxidant is added into the prior step to carry out reaction; the reaction liquid of the prior step is poured into the mixture of the ice and the water to separate out yellow crystal nitrobenzaldehyde. Products synthesized by the method of the invention can meet the requirement of use, namely, color, purity and ignition residue of the products can meet the market demand, and also has quite high yield; the nitrobenzaldehyde is synthesized by taking inexpensive nitrotoluene as the raw material ...

Method for synthesizing m-hydroxyphenylacetamide

The invention discloses a method for synthesizing m-hydroxy phenylethylamine from m-hydroxy benzaldehyde by condensation and catalytic hydrogenation. The method comprises the following steps: adding a solvent in m-hydroxy benzaldehyde, nitromethane and a catalyst, and carrying out condensation reaction in a reaction kettle; pouring the reactive solution in the precious step to an ice-water mixture to separate out yellow precipitate, and recrystallizing to obtain m-hydroxy-beta-nitrostyrene; and subjecting m-hydroxy-beta-nitrostyrene in the previous step to catalytic hydrogenation in a high-pressure kettle to obtain m-hydroxy phenylethylamine. The product synthesized by the method can meet the market requirements, that is to say, the color, the purity and the ignition residue of the product can meet the market requirements. The method has high yield, less experiment steps and low cost, and the organic solvent used in the entire synthesis process is nontoxic and cost-effective and can be ...

Preparation of polymer modified phase stable ammonium nitrate

The invention discloses a method for preparing polymer modified phase-stable ammonium nitrate. The method comprises the steps of synthesizing an organic polymer from styrene sodium sulfonate, acrylic ester, dimethyl diallyl ammonium chloride and butene diacid sodium by use of monomers, dissolving an organic monomer in water, stirring and heating the water, dripping initiator, preserving heat, heating, preserving heat, adding the synthetic organic polymer to a ammonium nitrate aqueous solution, heating the solution for dissolution, stirring the solution fast, naturally cooling the solution for crystallization, drying crystals at a temperature between 50 and 80 DEG C and obtaining the polymer modified phase-stable ammonium nitrate. As the method adds the organic polymer to ammonium nitrate, and as the polymer is low in air permeability and excellent in film-forming property, a film is great in toughness and elasticity, high in strength, capable of bearing volume expansion caused by crystal ...

用环己酮合成邻苯基苯酚的方法

... 本发明涉及一种用环己酮合成邻苯基苯酚的方法。其主要步骤为：环己酮在硫酸催化下，进行缩合反应，然后经中和、分离、脱水、精馏后得到二聚体2-(1-环己烯基)环己酮和2-环己亚烷基环己酮的混合物，未反应的环己酮回收后再进行二聚反应；二聚体以氮气或氢气为保护气进行脱氢反应，脱氢混合物经石油醚重结晶，得到邻苯基苯酚。本发明以环己酮为原料生产邻苯基苯酚二聚体，产物收率及纯度高、催化剂寿命长、生产成本低。 ...

Powdered ammonium nitrate fuel explosive and its preparing process

A powdered ammonium nitrate fuel explosive for opencast coal is prepared from light microporous ammonium nitrate (94-95 mass%) and compound fuel oil (5-6 mass%) and features high oil absorption, not caking, low hygroscopicity, high detonation sensitivity and speed, etc.

Process for synthesizing orthophenylphenol from cyclohexanone

The method for synthesizing o-phenylphenol by cyclohexanone includes the following main steps: under the condition of catalysis of sulfuric acid making cyclohexanone produce condensation reaction, then mkaing it undergo the processes of neutralization, separation, dehydration and rectification to obtain the mixture to dimer 2-(1-cyclohexenyl) cyclohexanone and 2-cyclohexylalkylene cyclohexanone; recovering non-reacted cyclohexanone and making dimerization reaction; using nitrogen gas or hydrogen gas as protective gas to make dimer undergo the dehydrogenation reaction, and making the dehydrogenated mixture undergo the process of petroleum ether recrystallization process so as to obtain the invented o-phenylphenol.

Preparation of metal deuteroporphyrin compounds and method of use thereof

The invention discloses a method for preparing metal deuteroporphyrin compound and an application method thereof. The method comprises the following steps: protohemin, hydroxyphenol and a spot of anhydrous aluminum chloride react under nitrogen protection, and then deuterohemin is obtained through washing and drying by using hot water; deuterohemin, concentrated sulfuric acid and methanol are added, and ultrasonic irradiation reaction is performed at room temperature; a reaction solution is extracted, and deuteroporphyrin dimethyl ester is obtained through recrystallization after the solvent is removed; deuteroporphyrin dimethyl ester is dissolved in chloroform, reflux reaction is performed by adding metal salt or oxide, the solvent is recovered through vacuum distillation, and the metal deuteroporphyrin compound is obtained through drying and recrystallization. When in application, the metal deuteroporphyrin compound is fixedly carried on a carrier, cyclohexane and metal deuteroporphyrin ...

Powdery nitramon and its processing method

Ammonium nitrate explosive without TNT for coal mine and production thereof

A non-TNT nitramon explosive for coal mine is prepared from modified porrous ammonium nitrate (73.5-82.5 wt.%), wood powder or charcoal powder (2.8-4.0), composite oil (3.0-4.5) and edible salt (10-20) through mixing them together. Obtained explosive features explosion in the condition of gas and coal dust, low hydroscopicity, not blocking, water-proof nature, and high power and safety. Its preparing process features simplicity and high reliability and safety.

Ammonium nitrate explosive without TNT for coal mine and prodn. thereof

Preparation method of metal deuteroporphyrin compound and application method thereof

The invention discloses a preparation method of metal deuteroporphyrin compound and an application method thereof; the preparation method comprises the following steps: chlorhematin, resorcinol and a little of anhydrous aluminium chloride are reacted under the nitrogen protection, and then washing by hot water and drying are carried out to obtain sub-chlorhematin; the sub-chlorhematin, concentrated sulfuric acid and methyl alcohol are added and carry out ultrasonic exciting reaction under room temperature, reaction liquid is extracted, recrystallization is carried out after solvent is removed, so as to obtain deuteroporphyrin dimethyl; the deuteroporphyrin dimethyl is dissolved in chloroform, metal salt or oxide is added to carry out backflow reaction, the solvent is recovered by vacuum distillation, drying and recrystallization are carried out to obtain metal deuteroporphyrin compound. The application is that: the metal deuteroporphyrin compound is fixedly loaded on a carrier, cyclohexane ...

Method for preparing fluoro-compound by microwave halogen-exchange fluorination

The invention discloses a method for preparing fluoro-compound by microwave halogen-exchange fluorination. The method comprises the following steps: a fluridizer is put into microwave to be dried for standby use; a reactant, the fluridizer, a solvent and a catalyst are added into a reactor; the reactor is sealed, and nitrogen is filled into the reactor for pressurizing, microwave heating and stirring are carried out to ensure full reaction; when the reaction is over, the temperature is cooled to room temperature, and the material is filtered to obtain the fluoro-compound crude product. The invention adopts a microwave generator to radiantly heat in the reactor, which replaces the traditional heating method at the exterior of the reactor, thus being beneficial for improving efficiency; the invention adopts the sealing method to prevent air from oxidizing, thus reducing the high temperature coking of the product; the invention increases the pressure of nitrogen in the reaction, thus being ...

Polymerizable emulsifier propylene acyloxy Span 80 as well as preparation method and uses thereof

Salt-containing waste water treatment method for meta-cresol production

This invention relates to a method for treating salt-containing waste-water from the production of M-cresol. The waste-water, after pre-treatment of absorption by powder activated carbon, is proceeded the electroosmosis treatment. The effluent is used as sulphuric acid solution for cyclic utilization, the residual salt-containing waste-water is neutralized for production of mirabilite. In this invention, the recovered sulphuric acid solution, after the treatment, contains Naf ion with its concentration being lower than 2g/L, the sulphuric acid solution recovery rate is upto 80%, and being able to be utilized in hydrolytic reaction for M-cresol production. This method is useful for environmental protection.

INDUSTRIAL MIXED EXPLOSIVES WITH LOW DETONATION SPEED AND ITS PREPARING METHOD

Semantic matching algorithm of large scale issuance and subscription system

The invention relates to the technical field of Web services, in particular to a semantic matching algorithm of a large-scale publish-subscribe system, which comprises the following steps: 1) an index is established for a subscription graph; 2) events are converted to a specific data structure; 3) the data structure of an event graph is submitted to an event matcher; and 4) the event matcher carries out the matching calculation of the event graph and the subscription graph mode, thus finding out the matching subscription and distributing the events to the matching subscribers by the system. The semantic matching algorithm can reduce the matching time of the events and the subscription, improve the matching efficiency of the events, allow the matching efficiency of the events not to be seriously affected along with the increase of the number of the subscription and publishing events and allow the performances of the system not to deteriorate. At the same time, the semantic matching algorithm ...

Powdered ammonium nitrate fuel explosive and its preparing process

Method for preparing bisphenol AF

The invention discloses a method for preparing bisphenol AF, comprising the following steps of: firstly, adding catalyst, aniline and HFA.3H2O into a reactor, adding organic solvent after backflow reaction, dissolving, filtering and spinning steaming to obtain a intermediate 1; secondly, adding sodium nitrite and the intermediate 1 obtained in the first step into sulfuric acid, transferring the mixed solution into the sulfuric acid for hydrolysis reaction after diazotization, extracting, washing and removing solvent to obtain a intermediate 2; and finally, adding the catalyst, the intermediate 2 obtained in the second step and the phenol into the reactor, performing backflow reaction, and extracting by organic solvent, washing by water and removing solvent to obtain the bisphenol AF. The bisphenol AF prepared in the invention has a purity as high as 99.5 percent; the operating condition is mild and safe, the reaction selectivity is good with little byproduct, the catalyst can be recycled ...