Industrial purified terephthalic acid particle size distribution estimation method based on microscopic image

The invention discloses a new method for estimating the particle diameter distribution of industrial pure terephthalic acid based on a microscopic image. The method comprises the following main steps: (1) the magnification times of the image is indicated; (2) an image of the industrial pure terephthalic acid is acquired through a microscope and a CCD camera; (3) the number, the area and the largest particle diameter of industrial pure terephthalic acid particles in a single image are extracted; (4) the area of the industrial pure terephthalic acid particles is utilized to obtain the equivalent diameter and the equivalent size; (5) a plurality of images are operated to obtain the particle diameter distribution and the size distribution; and (6) results of the particle diameter distribution and the size distribution are fitted to obtain the real particle diameter distribution and the real size distribution. The invention provides a set of a system which has low cost and high measuring precision ...

Astringe detecting probe method used for large scale varying duty real time process flow simulate

The invention discloses a probe-converging method for large-scale variable condition real-time process simulation. The method uses the obtained solution from the initial condition simulation in the real-time process simulation as the initial value to perform the process simulation of objective condition; when a solver fails to obtain the solution directly, the method is able to adjust condition parameters, select a searching method, and find middle condition points with a certain sequence, and by using these middle condition points, after a series of simulation operations the solver can obtain a group of initial values, which can be convergent, to solve the process simulation of the objective condition. Compared with the traditional real-time process simulation method, the invention can enhance the ratio of successful convergence of work condition real-time simulation, and solve the problem of bad convergence in the prior large-scale complicated chemical process real-time simulation. The ...

Model-free control method for focal distance of injection molded plastic lens

The invention discloses a model-free control method for the focal distance of an injection molded plastic lens. According to the invention, aiming at the problems such as frequent change of operation parameters, difficulty of process modeling, limited model precision and the like existing in the focal distance control process of the injection molded plastic lens, the model-free control method forthe focal distance of the injection molded plastic lens is designed according to the characteristics of the injection molded plastic lens that the cost in the production process is low and the batch can be repeated, thus the control on the focal distance of the plastic lens is realized. By utilizing the control method, the control overhead can be reduced, and the control time is shortened, thereby improving the focal distance control efficiency, and being beneficial to the energy conservation and emission reduction in the production process of injection molded lenses.

Multicore parallel solving method for computation of polymer molecular weight distribution

The invention discloses a multicore parallel solving method for the computation of polymer molecular weight distribution, comprising the following steps of: establishing a mechanism model of free radical polymerization dynamic simulation to solve the polymer molecular weight distribution by taking the free radical polymerization dynamic simulation as an object; dividing the mechanism model into asmall-scale free radical polymerization model and a large-scale free radical polymerization model through a decoupling method; solving the small-scale free radical polymerization model by utilizing avariable step-size and order backward difference method; and solving the large-scale free radical polymerization model to accelerate the solution of the computation of the polymer molecular weight distribution through a parallel sequential method by taking a multicore computer system as a computing platform. Compared with the traditional non-parallel solving method of the computation of the polymer molecular ...

On-line optimized wireless network data transmission method based on transmission data package length

The invention discloses a wireless network transmission method which is based on transmission data packet length on line optimization. The data transmission method comprises calculating the length of an optimum transmission data packet which is suitable for current network to transfer according to the relationship among optimum value of the length of a transmission data packet of wireless network, expect value of transmission time of continuous on line of network and network transmission speed, approximately calculating the expect value of transmission time of continuous on line of network through arithmetical average algorithm, and estimating transmission speed through average network transmission speed of forwards continuous on-line transmission time. The transmission method dynamicallyadjusts the length of a transmission data packet in the wireless network transmission process on line through utilizing the above algorithm, thereby improving data transmission property under wireless network ...

Operating condition optimization method for molecular weight distribution of free radical polymer

The invention discloses an operating condition optimization method for molecular weight distribution of a free radical polymer. A given molecular weight distribution curve is used as a product index for a free radical polymerization model, and a reaction temperature condition and reaction time are solved for keeping the maximum conversion rate of a reactant on the premise of meeting the product index. The method comprises the following steps of: taking a specific point on a target molecular weight distribution curve; taking polymer concentration values corresponding to a top point and a pointwith concentration being half of that of the top point as constraints in an optimal problem; obtaining an optimizing result through a control variable discretization method; performing analog computation on the molecular weight distribution by taking the result as an initial value; comparing error with the given molecular weight distribution curve; and optimizing through a random initial value reassignment ...

Nesting optimizing method for solving heat exchange network integration

The invention discloses a nested optimization method for solving heat exchanger network synthesis. The method decomposes the problem of heat exchanger network synthesis into two nested parts including network topology optimization and heat exchanging element parameter optimization. The taboo search method is used to implement the network topology combinatorial optimization on an outer layer, and on an inner layer, a corresponding model is automatically built for the heat exchanger network of the given topological structure and a sequential quadratic programming method is used to execute the parameter optimization. Compared with the traditional optimization method of the heat exchanger network synthesis, the method has a concise and clear principle, is easy to be implemented, and has overall optimality and fast convergence.

Multicore parallel solving method for computation of polymer molecular weight distribution

The invention discloses a multicore parallel solving method for the computation of polymer molecular weight distribution, comprising the following steps of: establishing a mechanism model of free radical polymerization dynamic simulation to solve the polymer molecular weight distribution by taking the free radical polymerization dynamic simulation as an object; dividing the mechanism model into a small-scale free radical polymerization model and a large-scale free radical polymerization model through a decoupling method; solving the small-scale free radical polymerization model by utilizing a variable step-size and order backward difference method; and solving the large-scale free radical polymerization model to accelerate the solution of the computation of the polymer molecular weight distribution through a parallel sequential method by taking a multicore computer system as a computing platform. Compared with the traditional non-parallel solving method of the computation of the polymer ...

一种利用手机实现无线工业监控的方法及系统

The invention discloses a method and system for realizing wireless industrial monitoring and control by utilizing mobile phones, wherein the Java function supported by mobile phones is utilized to download the monitoring and control terminal subsystem into the memory of the mobile phone and to be operated on the K-Java virtual machine of the mobile phone, thus data monitoring and control can be accomplished through the following process, (1) the user downloading and installing the monitoring and control of the mobile phone end, and accomplishing initialization, (2) the mobile phone monitoring and control subsystem submitting a registering request, the industrial monitoring control data server accomplishing authority limits allocation through identification, (3) the mobile phone monitoring control subsystem submitting monitoring control instruction through the wireless data network, (4) the industrial monitoring control data server accomplishing the command processing and returning the results ...

On-line optimized wireless network data transmission method based on transmission data package length

The invention discloses a wireless network transmission method which is based on transmission data packet length on line optimization. The data transmission method comprises calculating the length of an optimum transmission data packet which is suitable for current network to transfer according to the relationship among optimum value of the length of a transmission data packet of wireless network, expect value of transmission time of continuous on line of network and network transmission speed, approximately calculating the expect value of transmission time of continuous on line of network through arithmetical average algorithm, and estimating transmission speed through average network transmission speed of forwards continuous on-line transmission time. The transmission method dynamically adjusts the length of a transmission data packet in the wireless network transmission process on line through utilizing the above algorithm, thereby improving data transmission property under wireless ...

Astringe detecting probe method used for large scale varying duty real time process flow simulation

Model-free weight controlling method for injection molding product

The invention discloses a model-free weight controlling method for an injection molding product. In order to solve the problems of frequent operation parameter variation, difficult process modeling and finite model precision and the like during injection molding production, model-free quick product weight control is realized by using the characteristics of low cost and repeated batches of the injection molding production. The method is favorable for reducing the test expenses of a product weight control process and shortening the control time; moreover, the method has significance for improving the weight control efficiency during injection molding and achieving the effects of energy saving and emission reduction during injection molding industrial production.

Data correction method used for varying data of chemical engineering flow system

The invention discloses a data correction method under the condition of variable load of a chemical flow system. The method comprises the following steps: firstly, acquiring measuring data of a measuring instrument within a period of time, and applying steady state detection technology for steady state determination according to key measuring bits among the measuring data; secondly, taking mean values of the measuring data in various steady states, performing steady state operating condition interval division on the mean values of the steady state data according to the load, and dividing the mean values into a plurality of different steady state operating condition intervals; and thirdly, performing data correction and remarkable error detection on multi-variable multi-group measuring data in each steady state operating condition interval, and obtaining remarkable error detection results and data correction results of various steady state operating condition intervals. The method has more ...

Method for expanding compatibility of Aspen Plus to non-linear programming solver based on CAPE-OPEN

The invention discloses a method for expanding the compatibility of Aspen Plus for a nonlinear programming solver based on CAPE-OPEN. The method ensures that the compatibility o f Aspen Plus on the aspect of optimizing the solver is expanded, so that the Aspen Plus supports the optimization solver based on open computer aided process engineering. Aspen Plus interacts with the external nonlinear programming solver through the interface set of an open solver. In order to standardize the interaction between the Aspen Plus and the external solver, and well realize the integration and interoperability among software, a layer of middleware based on OI is realized between AOS and the external solver by adopting the technology of component object model and utilizing standard optimizing interface set issued by CAPE-OPEN laboratory network organization aiming at a mixed integer nonlinear programming. The invention ensures that the Aspen Plus can obtain and use an optimization algorithm with a better ...

Model expansion method used for correcting model defect in Aspen Plus

The invention discloses a model extension method which can modify the defects of modes in Aspen Plus. The method aims at the defects of the models and comprises: a user inputs the models which need to be supplemented through a text file; a model resolver is utilized to process to analyze for the models; then extension models and original models are syncretized. An optimization algorithm obtains information of the complete model via an interface defined by the invention and processes solving, wherein first derivative information of the extension models is obtained via numerical difference or automatic differentiation technology. The model extension method of the invention makes up for the defects of Aspen Plus in the modeling process so that the optimal solution obtained via the optimization algorithm is more accurate and reliable, is very simple, and has easy operation and convenient maintenance.

Parameter estimation method for multi-condition and large-scale chemical process model

The invention discloses a parameter estimation method for a multi-condition and large-scale chemical process model. The parameter estimation method aims at the problem of parameter estimation of the multi-condition and large-scale chemical process model, and in the method, multi-condition field measurement information is utilized, a simultaneous parameter estimation proposition is constructed, targets are adjusted in batch according to specific rules when direct solution is difficult for successful convergence, constraints are gradually added, a sequential parameter estimation optimization proposition is constructed, a solver is enabled to gradually solve successfully, at last the simultaneous parameter estimation proposition is solved on basis of a new initial value to ensure successful convergence of the solving. Compared with a traditional parameter estimation method, the method has higher convergence reliability, simple and clear principle, easy implementation and good portability.

Model expansion method used for correcting model defect in Aspen Plus

The invention discloses a model extension method which can modify the defects of modes in Aspen Plus. The method aims at the defects of the models and comprises: a user inputs the models which need to be supplemented through a text file; a model resolver is utilized to process to analyze for the models; then extension models and original models are syncretized. An optimization algorithm obtains information of the complete model via an interface defined by the invention and processes solving, wherein first derivative information of the extension models is obtained via numerical difference or automatic differentiation technology. The model extension method of the invention makes up for the defects of Aspen Plus in the modeling process so that the optimal solution obtained via the optimization algorithm is more accurate and reliable, is very simple, and has easy operation and convenient maintenance.

Data correction method used for varying data of chemical engineering flow system

The invention discloses a data correction method under the condition of variable load of a chemical flow system. The method comprises the following steps: firstly, acquiring measuring data of a measuring instrument within a period of time, and applying steady state detection technology for steady state determination according to key measuring bits among the measuring data; secondly, taking mean values of the measuring data in various steady states, performing steady state operating condition interval division on the mean values of the steady state data according to the load, and dividing the mean values into a plurality of different steady state operating condition intervals; and thirdly, performing data correction and remarkable error detection on multi-variable multi-group measuring data in each steady state operating condition interval, and obtaining remarkable error detection results and data correction results of various steady state operating condition intervals. The method has more ...

Graphic processor parallel solving method for polymer molecular weight distribution solving

The invention discloses a graphic processor parallel solving method for polymer molecular weight distribution solving. The method comprises the following steps of: establishing a dynamic analog mechanism model of free radical polymerization reaction to solve polymer molecular weight distribution; decomposing the mechanism model into a small-scale free radical polymerization reaction model and a large-scale free radical polymerization reaction model by a decoupling method; solving the small-scale free radical polymerization reaction model by utilizing a step and order changing backward difference method; and solving the large-scale free radical polymerization reaction model by a parallel sequential method to accelerate the solution of molecular weight distribution calculation by using a graphic processor of the NVIDIA corporation as a calculation platform. Compared with the traditional nonparallel polymer molecular weight distribution solving method, the invention can fully utilize thecharacteristic ...

Method for expanding compatibility of Aspen Plus to non-linear programming solver based on CAPE-OPEN

The invention discloses a method for expanding the compatibility of Aspen Plus for a nonlinear programming solver based on CAPE-OPEN. The method ensures that the compatibility o f Aspen Plus on the aspect of optimizing the solver is expanded, so that the Aspen Plus supports the optimization solver based on open computer aided process engineering. Aspen Plus interacts with the external nonlinear programming solver through the interface set of an open solver. In order to standardize the interaction between the Aspen Plus and the external solver, and well realize the integration and interoperability among software, a layer of middleware based on OI is realized between AOS and the external solver by adopting the technology of component object model and utilizing standard optimizing interface set issued by CAPE-OPEN laboratory network organization aiming at a mixed integer nonlinear programming. The invention ensures that the Aspen Plus can obtain and use an optimization algorithm with a better ...