149 results about "Time reaction" patented technology

A pressure sensing apparatus for operative arrangement within an environment, having: a sensor comprising a hermetically-sealed receptacle, at least one side of which has an flexible membrane to which a magnetically hard element is attached. Enclosed within the receptacle is a magnetostrictive element that vibrates in response to a time-varying magnetic field. Also included is a receiver to measure a plurality of successive values for magneto-elastic emission intensity of the sensor taken over an operating range of successive interrogation frequencies to identify a resonant frequency value for the sensor. Additional features include: (a) the magnetically hard element may be adhered to an inner or outer side of, or embedded within, the membrane; (b) the magnetostrictive element can include one or more of a variety of different pre-formed, hardened regions; (c) the magneto-elastic emission may be a primarily acoustic or electromagnetic emission; and (d) in the event the time-varying magnetic field is emitted as a single pulse or series of pulses, the receiver unit can detect a transitory time-response of the emission intensity of each pulse (detected after a threshold amplitude value for the transitory time-response is observed). A Fourier transform of the time-response can yield results in the frequency domain. Also, an associated method of sensing pressure of an environment is included that uses a sensor having a magnetostrictive element to identify a magneto-elastic resonant frequency value therefore. Using the magneto-elastic resonant frequency value identified, a value for the pressure of the environment can be identified.

Described herein are environmentally isolated tissue culture devices that may be used for cell culture, as well as systems including these devices and methods for using them. These devices may include control features for regulating the micro-environment within a well or wells of the device. For example, on-board features may regulate the temperature, humidity, pH, media level, media composition, CO2 / O2 / N2 levels, drug concentration, cell density, byproduct (or product) production, and mixing of materials within the chamber. Material may be added to or withdrawn from the wells of the device without opening the device. Also described herein are controllers for analyzing and controlling the micro- environment within the well. Thus, the plates described herein may be used without requiring a separate incubator, allowing cells to be analyzed (e.g., imaged) continuously, allowing real-time reactions while monitoring under a microscope for hours, days or even weeks.

There is provided a device and a method for collecting information from a customer concerning a point of interest. The device comprises a memory including a unique location identifier associated with a point of interest and a processor, the processor configured to store in the memory a received unique customer identifier and received information concerning the point of interest from a customer. The device can transmit this stored data to a center via a network, where the center can aggregate the data. There is also provided a system for distributed collection of information from customers concerning points of interest, utilizing a plurality of devices and a center for aggregating data. The center can apply data analysis and mining to the aggregate data, allowing rapid and real-time reaction to feedback from customers, efficient turnaround for resolving customer service issues, and enabling efficient research of customer preferences and trends.

There is provided a device and a method for collecting information from a customer concerning a point of interest. The device comprises a memory including a unique location identifier associated with a point of interest and a processor, the processor configured to store in the memory a received unique customer identifier and received information concerning the point of interest from a customer. The device can transmit this stored data to a center via a network, where the center can aggregate the data. There is also provided a system for distributed collection of information from customers concerning points of interest, utilizing a plurality of devices and a center for aggregating data. The center can apply data analysis and mining to the aggregate data, allowing rapid and real-time reaction to feedback from customers, efficient turnaround for resolving customer service issues, and enabling efficient research of customer preferences and trends.

The invention provides an intelligent wheelchair man-machine interaction system and method based on facial expression recognition and relates to the field of the biology, the psychology, the computer vision, mode recognition, artificial intelligence and the like. According to the method, a geometric model matching algorithm is used for automatically locating centralized effective eyebrow, eye and mouth areas of facial features, then ASM feature points of the eyebrow, eye and mouth areas are located, and convolution operation is carried out on located feature point pixels and Gabor wavelet kernel functions to extract the facial expression features; an Adaboost algorithm is used for iterating and training the facial features to obtain an expression classifying model; the expression classifying model is adopted for recognizing input expression sequences in a classifying mode, the input expression sequences are compared with a control instruction defined in advance, and therefore interaction control over an intelligent wheelchair from facial expression recognition is achieved. When the facial expression features are extracted, real-time recognition of facial expressions is greatly improved, and real-time reaction with the intelligent wheelchair is greatly improved.

The invention relates to a method for selective hydrogenation of reforming generated oil. According to the reforming generated oil, the bromine index is 7270mgBr / 100g oil, and the weight of arene is 66.83%; the reaction conditions are as follows: the reaction temperature is 170 DEG C, the hydrogen partial pressure is 1.6MPa, the speed of liquid is 4h<-1> and the volume ratio between hydrogen and oil is 200. The method is characterized in that the used catalyst is Pd / gamma-Al2O3 containing 0.3wt% of palladium, and is passivated by a dry method with sulfur-containing compounds such as dimethyl disulfide, methyl thioether, butyl mercaptan or hydrogen sulfide before being filled; the added amount of the sulfide for passivation is as follows: the molar ratio of the palladium and the sulfur is 1-3.5; and the passivation temperature ranges from normal temperature to 230 DEG C. The method has the advantages that the pollution can be reduced, the investment can be reduced, convenience is brought for starting operation; after the palladium catalyst is passivated by the sulfide, the loss of arene of a hydrorefined product is lower than 0.5% (weight); after short-time reaction, the bromine index of the product is lower than 100 and the requirement of arene extraction for the raw materials can be met.

The invention provides an intelligent feedback type music relaxation hypnosis treatment system and a realization method, which belong to the technical field of medical equipment. The treatment system mainly includes a physiological index module, an intelligent song selection module, a music therapy module, and a treatment feedback module. The physiological index data of the consultation object is obtained through the physiological index module, and the corresponding music is selected through the intelligent song selection module according to the obtained physiological index data. , through the music therapy module, use the selected music to adjust the treatment mode for the counseling object, and use the treatment feedback module to implement the next treatment operation according to the treatment feedback results. Compared with the traditional treatment system, it can not only implement emotional and physical relaxation therapy for the counseling object, but also help counselors who do not have hypnosis technology to effectively hypnotize the counseling object with the assistance of professional music, and understand the real-time inner reaction of the counseling object And real feelings, so that the treatment effect can reach the best state.

The invention discloses a soaker, which comprises a base, a rotary conveying mechanism, a discharge mechanism, a feeding mechanism, feed collects and the like, wherein the base is provided with a cylindrical soaking groove; the rotary conveying mechanism is arranged in the soaking groove; a rotary conveying and soaking mechanism is provided with a plurality of feed collects; the discharge mechanism is adjacently arranged with the feeding mechanism and is positioned on one side of the soaking groove; the discharge mechanism and the feeding mechanism are connected with the rotary conveying mechanism, and control output and input of the material between the feed collects; and are actuated by the rotary conveying mechanism, the discharge mechanism and the feeding mechanism allow the material in the feed collects to be heated and soaked for long time(30 to 60 minutes) on one side of the soaking groove, and rotate forward slowly at the same time. The residual glue on the material is removed after being soaked in a liquid medicine in the soaking groove and undergoing reaction at certain temperature and for a certain period of time. The rotary soaking and conveying mode can continuously feed and discharge material at the same time, considerably reduce the volume of the soaker and remove residual glue of large amount of materials in minimum space.

A method for manufacturing metal nanometer replaces two stages (firstly producing cuprous oxide, then producing copper particles by a reducing agent) of a metal particle producing process by one stage, such that it is capable of simplifying the working process obviously, obtaining metal copper particles easily by a short-time reaction at a low temperature (15-60 DEG C), omitting a complicated rinshing process of removing metal salts by secondary rinshing, and particle size dispersion is uniform and there is non requirement of a hierarchical process, thus the method is suitable for lot production. The method includes a first stage of dissolving metal precursor in a dissolvent containing a glycols dissolvent; a second stage of adding organic amine to the prepared solution, stirring until the color of the solution does not change; and a third stage of slowly adding more than one compounds selected from hydrazine derivatives, sodium hypophosphate, hydroxyl amine and sodium borohydride to the solution containing the organic amine of the second stage, so as to deoxidize and precipitate the metal(s).

A system and method for media content evaluation based on combining multi-modal inputs from the audiences that may include reactions and emotions that are recorded in real-time on a frame-by-frame basis as the participants are watching the media content is provided. The real time reactions and emotions are recorded in two different campaigns with two different sets of people and which include different participants for each. For the first set of participants facial expression are captured and for the second set of participants reactions are captured. The facial expression analysis and reaction analysis of both set of participants are correlated to identify the segments which are engaging and interesting to all the participants.

The invention provides a nuclear power plant remote monitoring system. The nuclear power plant remote monitoring system comprises nuclear radiation sensor nodes arranged in monitoring points of a nuclear power plant and used for monitoring the radiation values of the monitoring points so that monitoring data can be obtained, video monitoring modules arranged in the monitoring points of the nuclear power plant and used for conducting real-time monitoring through video so that video data can be obtained and transmitted through communication cables, a wireless communication module used for transmitting the obtained monitoring data to a remote monitoring center through a wireless communication network, the remote monitoring center used for receiving the video data and the monitoring data and controlling the monitoring points according to the video data and the monitoring data, wherein the nuclear radiation sensor nodes, the video monitoring modules and the wireless communication module are respectively inserted in a function circuit board. By the adoption of the nuclear power plant remote monitoring system, the real-time reaction capacity can be improved and the monitoring delay can be shortened.

A chemical-free and no-microbe method for pre-treating a broad range of waste waters is presented. The said method involves electrocoagulation (EC) operated in synchronization with electrolytic ozone (EO3). In the combinatory method, each technique not only applies its own treatments, they also create synergistic effects from real-time reactions among the reagents generated by electrolysis. Two refractory waste waters, seawater and tannery effluent, are tested by the combinatory method, EC+EO3, to assess the viability of the said method. Without adjustment, each of the said waste waters is remedied by EC+EO3 from its raw state to a clean condition more effectively and more economically than that can be delivered by the respective prevailing processes of pretreatment for each of the said waste waters.

The invention discloses a preparation method of hexamethylenediamine. Hexane dinitrile is used as a raw material, and a nano-nickel and magnesium oxide composite material is used as a catalyst to prepare the hexamethylenediamine through liquid phase hydrogenation. The preparation method of the hexamethylenediamine comprises the following steps: dipping a porous carrier by using nickel acetate andmagnesium nitrate aqueous solutions at different concentrations at first, and carrying out in-situ reduction to obtain an immobilized nickel and magnesium oxide based composite catalyst under different conditions; adding raw materials, the catalyst and a solvent in a reaction kettle in proportion, sealing the reaction kettle, removing air in the kettle by a hydrogen substitution method, starting aheating power supply, applying set pressure to hydrogen after the temperature in the kettle is raised to the set reaction temperature, then starting a magnetic stirrer, and beginning to time reaction; and after the reaction is finished, filtering out the catalyst, and distilling and separating under reduced pressure. The yield of a target product is high, the yield of the hexamethylenediamine isgreater than 70%, and the solvent and the catalyst are recyclable.

The invention relates to a method for rapid thermal control of a reaction volume (4) of a reaction vessel (2) for a change of temperature of the reaction volume (4) from a preceding temperature to a target temperature. Characteristic for the method is that the change of temperature is carried out by first bringing at least the second wall (8) of a second material with a high thermal conductivity of the reaction vessel (2) in direct contact with a first thermal block (14-19), at a temperature higher than the target temperature if the target temperature is higher than the preceding temperature, or correspondingly at a temperature lower than the target temperature if the target temperature is lower than the preceding temperature, for a time needed to bring the temperature of the reaction volume (4) to or close to the target temperature; and then bringing at least the second wall (8) in direct contact with a second thermal block (14-19) at the target temperature to bring the reaction volume (4) to the target temperature and / or keep the reaction volume (4) at the target temperature for the time intended. The first thermal block (14-19) is at a constant predetermined first temperature and the second thermal block (14-19) is at a constant predetermined second temperature. The invention also relates to a system (20) for detecting and / or quantitating a biological and / or chemical analyte or analytes in a sample supposedly containing said analyte or analytes for carrying out the method. The invention further relates to a software product for the system (20) and uses of the system (20).

The invention discloses a dual real-time fluorescent RT-PCR method for identifying and detecting a PRRSV classic strain and a highly pathogenic mutant strain, and an RT-PCR cation primer and a probe against the PRRSV classic strain and the highly pathogenic mutant strain for the method. Compared with the prior art, the method is characterized by rapidness, simplicity, strong specificity, high sensitivity and good reliability and can simultaneously carry out large batch sample analysis, and one-time reaction can identify and diagnose whether a sample is infected by the PRRSV classic strain or infected by the PRRSV highly pathogenic mutant strain or infected by the two strains, thereby providing a powerful technical support for monitoring and controlling a PRRS epidemic disease and having good application prospects.

The invention relates to a valveless micro-fluidic gradient real-time reaction chip and a reaction control method in the micro-fluidic technical field. Magnetic particles are marked on target molecules which need reacting with drugs, while non-retentive micro-column arrays are arranged in a concentration gradient field forming zone in the front of the tail end of an outlet of a traditional pyramid-type micro-fluidic gradient chip, by the structure, a high gradient magnetic field generated under an external magnetic field previously adsorbs drug molecules marked with the magnetic particles before the gradient field reaction, thereby the drug molecules are fixed in a pipeline at the front end of the outlet of the pyramid-type micro-fluidic gradient chip. When in gradient real-time reaction, after being continuously shunted and mixed and finally forming the gradient field at the tail end of the chip and flowing through the soft non-retentive micro-column arrays, drugs can simultaneously react with the drug molecules fixed hereof. The design of the chip is mainly used in various aspects such as the research of biological macromolecule reaction and action mechanism, the screen of drugs, and the like.

The invention relates to a driving risk evaluation system based on a vision characteristic. The driving risk evaluation system comprises a first hot computer, an information exchange unit and a secondhost computer. The information exchange unit is provided with a media playing module, a driver control module and a data acquisition module. The second host computer is provided with a quantifying processing module and a result display module. The first host computer is used for generating and transmitting required multimedia information. The media playing module is used for receiving and playingthe multimedia information. The driver control module is used for receiving and transmitting a driver reaction signal. The data acquisition module is used for acquiring and transmitting real-time reaction data of a driver. The quantifying processing module is used for performing quantification processing of the driver reaction signal and the real-time reaction data. The result display module outputs a driver risk perception capability detecting result. According to the system of the invention, a simulated true driving environment is adopted for performing risk perception capability detectionon the driver, thereby facilitating analysis to vision factors of an accident driver, and performing vision-based risk perception training on the driver.

The invention discloses a device and method for directly growing atom-dimension two-dimensional semiconductor heterojunction. The device comprises an atmosphere adjusting device, rapid switching devices, a quartz tube, a heating device and a vacuum adjusting device. The middle section of the quartz tube is located inside the heating device, the rapid switching devices are arranged at the left and right ends of the quartz tube, and comprise switching rods, rear end covers, front end covers, first sleeves, second sleeves, first high-temperature-resistant O rings, second high-temperature-resistant O rings and quartz components. The device has the advantages of being efficient, rapid and simple in structure, and through the reaction device, the atom-dimension two-dimensional semiconductor heterojunction can be directly grown on the surface of a substrate. The device can be used for growing the heterojunction or two or more kinds of single substances through one-time reaction, in this way, the growing time of the material is shortened, the growing cost is lowered, and production efficiency is improved.

The invention provides a catalyst for directly converting syngas to prepare low-carbon olefin, and a preparation method and an application thereof. The catalyst comprises a metal oxide catalyst MOx-ZnO-NOy for converting the syngas to prepare methanol and an SAPO-34 molecular sieve catalyst for converting the methanol to prepare the low-carbon olefin, wherein the metal oxide catalyst comprises, bymass, 29-85% of MOx, 14-64% of ZnO and 0.2-7% of an additive NOy; and a mass ratio of the MOx-ZnO-NOy to the SAPO-34 is 0.3-5. Traditional low-carbon olefin is synthesized through a two-step series reaction of the syngas (that is the methanol is synthesized from the syngas, and then is converted from methanol to the low-carbon olefin), and the catalyst in the invention allows the syngas to be directly selectively converted into the low-carbon olefin through a one-time reaction, so the energy consumption and the device investment cost are significantly reduced; and the catalyst also has a goodstability, and facilitates the large-scale industrial application.

The invention discloses a CO2 electroreduction electrolysis tank. A solution flow field plate in the electrolysis tank is provided with flow channels penetrating through a first insulating surface anda second insulating surface, and the flow channels cooperate with a cathode gas diffusion electrode and an electrolyte supporting layer to form an electrolyte cavity for a reaction of CO2 with an electrolyte. The first insulating surface of the solution flow field plate is provided with a groove, and the electrolyte supporting layer is embedded in the groove to make the solution flow field platein close fit with the electrolyte supporting layer. A feeding groove communicated with the electrolyte cavity is arranged at one end of the electrolyte cavity, the feeding groove is communicated witha material channel, a discharge groove communicated with the electrolyte cavity is arranged at the opposite end of the electrolyte cavity, and the discharge groove is communicated with the material channel. The flow channels increase the flow paths of reactants in the electrolyte cavity, so the reaction degree of the reactants is increased, and the attenuation rate of the CO2 electrical reductionability is reduced, thereby the stability of the CO2 electrical reduction ability in the long-time reaction process is increased, and the stability of the product yield is ensured.

The invention discloses a protection method of a lithium metal electrode. By use of a simple alloyage method, antimony trifluoride is utilized to form an artificial protective film on the surface of alithium cathode, so that polarization of the lithium cathode can be effectively lowered, and generation of dendritic crystals can be suppressed. According to the method, antimony trifluoride and lithium are mainly utilized for a reaction to generate the dense artificial protective film, wherein antimony trifluoride is dissolved in propylene carbonate to prepare a uniform solution first, pretreatment is performed on the surface of a lithium wafer to remove oxidized lithium on the surface, the lithium wafer is cut into a round wafer, the round wafer is immersed in the antimony trifluoride solution for a reaction to obtain a treated lithium electrode, and finally a symmetric battery is obtained through assembling. Through a low-concentration long-time reaction, a dense alloy layer can be generated on the surface of lithium metal. Through the method, the polarization of the lithium metal cathode is fully lowered, circulation stability is good, generation of lithium dendritic crystals is effectively suppressed, and the stable lithium metal cathode is obtained; and when the lithium metal cathode is applied to a lithium battery, the circulation performance and safety performance of the lithium battery can be improved, and potential commercial application value is obtained.

The invention discloses a reverse transcription loop-mediated isothermal amplification (RT-LAMP) visual kit for detecting Japanese B encephalitis virus and application of the kit. The visual kit contains a primer group and color development substances, wherein primers have sequences shown as SEQ ID NO.1-4, and the color development substances are calcein and manganese chloride. A using method of the kit comprises the following steps of: preparing an RT-LAMP system containing AMV reverse transcriptase, a 1 time reaction buffer solution, strand displacement DNA polymerase, a dNTP mixture, betaine, calcein, manganese chloride, MgSO4, a forward inner primer (FIP), a backward inner primer (BIP) group, an F3 primer, a B3 primer and RNA of a sample to be detected; performing thermostatic reaction on the reaction system at the temperature of between 61 and 65 DEG C, and inactivating; and judging a result under natural light or ultraviolet or natural light and ultraviolet, wherein if the reaction product is green under the natural light, the sample to be detected contains the Japanese B encephalitis virus; and if the reaction product represents obvious green fluorescence under the ultraviolet, the sample to be detected contains the Japanese B encephalitis virus.

The invention relates to a loaded metal hydrogenation catalyst, its preparation method and application in ethylene glycol preparation. With a spherical SiC / C molecular sieve as a carrier and a metal loading capacity of 0.1-15 wt%, the catalyst adopts nickel as a main metal catalyst, and contains the metal auxiliary agents of Zn, Cu, Co, Fe, Cr, Sn, Bi, Re, La, Ce, Nd, Sm, and Gd. In a catalytic process, a certain amount of methyl oxalate, glycolic acid and the above loaded metal hydrogenation catalyst are added into a solvent, under a hydrogen atmosphere as well as a certain temperature and pressure, ethylene glycol can be prepared. The catalyst of the invention is suitable for the gas-solid phase or liquid-solid phase catalytic hydrogenation process of methyl oxalate and glycolic acid, and the catalytic process is characterized by high activity and selectivity to ethylene glycol. Meanwhile, the catalyst provided in the invention has excellent stability, and is suitable for a long time reaction process of batches.

The invention discloses a reaction system for countercurrent continuous esterification of biodiesel. The system comprises a raw material storage tank, a methanol storage tank, at least one first reaction tower and at least one second reaction tower, and at least one separator connected between a reaction product outlet of the first reaction tower and a material inlet of the second reaction tower. The raw material storage tank is connected to a catalyst storage tank and a material inlet at the upper part of the first reaction tower; the methanol storage tank is connected to a methanol inlet at a lower part of the second reaction tower; and a methanol outlet at the top of the second reaction tower is connected to a methanol inlet at the bottom of the first reaction tower. The invention realizes countercurrent esterification of biodiesel, and real-time reaction and separation of glycerol, water and methanol, greatly shortens the reaction time, and achieves thorough reaction.

The invention discloses a lithium iron phosphate-based composite positive electrode material. The lithium iron phosphate-based positive electrode material comprises lithium iron phosphate and graphene, wherein a thin film made of the grapheme uniformly wraps a lithium iron phosphate nanocrystal, the lithium iron phosphate is obtained by converting a lithium iron phosphate precursor, and the lithium iron phosphate precursor and the graphene are simultaneously synthesized through one-time reaction. The preparation method of the composite positive electrode material comprises the following steps: mixing a lithium source, an iron source and phosphate according to a stoichiometric ratio, adding nanoscale flake graphite and the like, carrying out high-energy ball milling so as to obtain the precursor, heating the obtained precursor in an inoxidizability atmosphere, and carrying out heat preservation, thus obtaining the lithium iron phosphate-based composite positive electrode material disclosed by the invention. The lithium iron phosphate-based composite positive electrode material disclosed by the invention can be applied as the lithium battery positive electrode material. The first specific discharge capacity of the lithium battery at the 2C rate can reach above 163mAh g<-1>, and after the battery cycles 1000 times at the 2C rate, the retention rate of the specific capacity of the battery is greater than 95%.

A method for preparing a chalcopyrite-type semiconductor compound which is widely used as a sunlight-absorbing material. More specifically, disclosed is a method for preparing a chalcopyrite-type compound, in which microwaves are used as heat sources in the preparation of the chalcopyrite-type compound, and the chalcopyrite-type compound can be produced in a large amount in a short reaction time using a batch or continuous reactor.

The invention provides a method for preparing AMG416 by combination of solid and liquid phase, and belongs to the field of polypeptide synthesis. The method is characterized by comprising the following steps: firstly, preparing completely-protected main chain peptide resin by using acid-sensitive amino resin as a solid phase carrier; then, directly adding diluted acid lysate to the peptide resin,and simultaneously, adding Y-Cys(X)-OH to form a disulfide bond to obtain a completely-protected target peptide; and finally, performing cracking and purification to obtain the AMG416. By adopting themethod provided by the invention for preparing the AMG416 by combination of the solid and liquid phase, the reaction time is shortened, the increase of by-products caused by long-time reaction is reduced, the purity of the target peptide is improved, the cost is reduced, the pollution to the environment is reduced, and large-scale production is facilitated.

The invention relates to a method for preparing an indium oxide film with octahedral nanocrystal microscopic shape on a substrate, which comprises the following steps: (1) preparing a mixed solution of ethylene glycol, water, anhydrous ethanol and glacial acetic acid, dissolving inorganic indium salt in the mixed solution to form a solution with the indium ion concentration of 0.50-2.60 mol.L<->, and quickly stirring at room temperature for 2 hours; (2) adding citric acid into the solution, stirring, and dissolving, wherein the concentration of the citric acid is 0.08-0.60 mol.L<->; (3) heating the solution in the step (2) to 30-70 DEG C, stirring at such temperature for 1-8 hours, and cooling to obtain a sol; (4) dripping 1-5 drops of sol onto a clean 2*2cm<2> substrate, preparing a film by spin coating, and drying the obtained film at 100 DEG C for 2 hours to obtain a gel film; and (5) sintering the gel film in the step (4) at 450-700 DEG C to obtain the indium oxide octahedral nanocrystal film. The preparation method is based on a mild sol-gel technique, does not need any CVD (chemical vapor deposition) growth system, can directly prepare the indium oxide film with octahedral nanocrystal microscopic shape on the substrate, and has the advantages of no catalyst residue, no need of atmosphere protection, high single-time reaction yield, low cost and the like.

The invention relates to an ammonium sulfite method-based caramel colour production process, which includes the following steps: after materials are proportioned, the PH is regulated to 1.0 to 10.0; an ordinary method is adopted for a first-time reaction; the first-time reaction is not stopped until no DE value is detected; an ammonium sulfite catalyst is added after the materials are rapidly cooled to below 90 DEG C, and the materials and the ammonium sulfite catalyst are agitated sufficiently to be mixed uniformly; an ammonium sulfite method is adopted for a second-time reaction; the second-time reaction is stopped when the colour index meets the requirement, and cooling, filtration, preparation and filling are then carried out. The invention adopts the combination of an ordinary method-based caramel colour production process and the ammonium sulfite method-based caramel colour production process; the ordinary method-based caramel colour production process is first carried out to deplete the reducing sugar in reactants, blocking the reducing sugar as one of the necessary conditions for producing 4-methylimidazole; the ammonium sulfite catalyst is then added to carry out the ammonium sulfite method-based caramel colour production process to prepare caramel colour, and thereby the 4-methylimidazole content of a caramel colour product can be stably controlled at a level lower than 0.01mg / kg.

The invention discloses a method for simulating work of a crane cable based on a game engine. The method comprises the following steps of: a, editing cable simulation relevant parameters in an off-line way; b, dynamically constructing physical models of a main cable and an auxiliary cable; and c, dynamically rendering a cable geometrical model to realize real simulation of the working state of the crane cable. Due to the adoption of the method for simulating work of the crane cable disclosed by the invention, real simulation of the working state of the crane cable can be realized, and the real-time reaction of the operation of a crane driver can be met; and the method has high expansibility, and is convenient to use. The method is based on a game engine Unity 3D; and in a platform, a most advanced graphics technology is adopted, a most popular physical engine PhysX is integrated, and the cost is low.