CN102708452A - Water quality analyzing/calculating service system supporting dynamic compiling - Google Patents
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Abstract
The invention relates to a water quality analyzing/calculating service system supporting dynamic compiling. The system is designed in a three-layer network structure consisting of a data service layer, an application service layer and a user layer, and is composed of a water quality database, a calculation result library, a calculation task library, a water quality analysis algorithm library, a computing server, a dynamic compiling server, a water quality analyzing and calculating result displaying unit, a water quality analyzing and calculating task management unit and a water quality analyzing algorithm management unit. The system disclosed by the invention can satisfy the needs of analysis on various different water environment monitoring and water quality early-warning, thereby greatly improving the flexibility and the openness of the conventional water quality monitoring system and the conventional water quality early-warning system.
Description
Technical field
The invention belongs to the application of informationization technology in water environment and water quality monitoring field; Relate to a kind of water analysis calculation services system constructing technology; Be meant especially through combining Web technology and dynamic compilation techniques building network service system; Secondary processing Analysis Service to the water quality raw data is provided, comprises data pre-service, water quality assessment, water quality prediction, water quality early-warning etc.This system can provide effective support and service for monitoring water environment, water quality safety safeguard work.
Background technology
In recent years, sudden water pollution accident takes place again and again, is constantly worsening the water environment of China, threatens people's water safety, has brought tremendous loss to social economy, makes that the nervous contradiction of water resource is outstanding further.In the face of water environment present situation complicated and changeable; According to actual conditions to water quality analyze, evaluation and early warning, tackle various burst Pollution accidents flexibly, effectively the water quality treatment contamination accident; Ensure people's water safety, the loss that reduces each side to greatest extent has important practical significance.
Therefore, be necessary further to strengthen the construction of China's water quality monitoring system and monitoring water environment system, to improve prevention and emergency processing ability to water pollution accident.Setting up the water quality early-warning system is to generally acknowledge and the general influence of avoiding, reduce the burst Pollution incident in the world at present, ensures the feasible method of source water quality and water supply security.The water quality early-warning system is on the basis of water quality monitoring, and source water and drinking water quality are estimated, predicted and analyze, and has judged whether alert, and the corresponding police's degree of report so that get rid of alert suffering from through various measures, reduces and pollutes the loss that causes.
Since the 90's of last century; With water quality on-line automatic analyzer device is core; The comprehensive water quality monitoring early warning system that utilization modern sensor technology, automatic control technology, computer technology and communication network are formed has obtained using widely; At present all obtaining bigger development aspect automatic water quality monitoring, water quality assessment, the water quality prediction: (1) aspect the monitoring technology, the water quality monitoring index develops into many indexs such as utilizing microorganism even biology from simple physics and chemical single index; (2) aspect water quality assessment, water quality safety assessment indicator system capable of using various comes whole water quality condition is estimated; (3) aspect water quality prediction, have through setting up water quality prediction of river forecasting model, lake nutriment parameter forecasting model, water system forecast model etc. and realize the report of water quality forecast and analogue simulation; (4) aspect practical application, the comprehensive water quality monitoring early warning information system that is used for the burst accident early warning has all been developed in developed country such as the U.S., Germany, Japan and China part basin, has effectively ensured the water environment safety in city and basin.
Yet existing most of water quality monitoring systems or monitoring water environment system adopt fixing Threshold Alerts pattern, and promptly when the water quality raw data surpassed national regulation water quality standard or self-defined standard, system reported to the police.And alarm threshold value or alarm algorithm generally are embedded in water analysis equipment (system) inside.Adopt this a kind of single alarm mode and fixing embedded algorithm, can't adapt to complicated day by day at present water environment pollution present situation.
Generally speaking; Because complicacy, the diversity of pollutant and the randomness of accident of water environment; The present situation that existing most water quality monitoring system/the monitoring water environment system reports to the police according to alert limit (alarm threshold value) is difficult to satisfy the needs that carry out water environment/water quality Intelligent Measurement and detect automatically.Severe situation in view of the present water environment of China; Set up water analysis service system advanced, robotization, technology and information treatment technology open, Network Based; To replace the warning that exceeds standard of traditional, single water-quality guideline, become China present water environment safety field and be badly in need of the problem furtheing investigate and solve.
Summary of the invention
Technical matters to be solved by this invention is: the deficiency that overcomes existing monitoring water environment system and water quality monitoring system; A kind of water analysis calculation services system that supports on-the-flier compiler is provided; Utilizing this system to can be all kinds of water quality monitoring equipment and water quality monitoring system provides self-defined water analysis algorithm compiling service to calculate the telecommunication network service with water analysis, to improve automatization level and the intelligent level that has water quality monitoring equipment and water quality monitoring system now.
As shown in Figure 1, the technical scheme that the present invention taked is: system adopts B/S (browser/server) three-layer network structure construction, comprises data service layer, application service layer and client layer.Wherein:
(1) data service layer is responsible for the storage of multi-source water quality data, water analysis algorithm, intermediate data and result data and is shared, and comprising:
A. water quality data storehouse: be mainly used in storage, share water quality historical data and Monitoring Data in real time, and comprise related datas such as water quality monitoring station information, hydrographic information, weather information, be the water analysis work service.
B. calculation task storehouse: be used to store water quality analytical calculation task, comprise task names, task type, task status, task performance period, task creation time, working time next time, working time last time, corresponding algorithm ID, corresponding monitoring point contents such as (data sources); The water analysis calculation task is meant and utilizes water quality data to certain particular analysis purpose, according to water analysis algorithm or water analysis model, to water quality estimate, prediction, early warning and acquire knowledge property result's process.
C. water analysis algorithms library: with code text and two kinds of stored in form water analyses of dynamic link library algorithm, wherein code text is user-defined, to be compiled water analysis algorithmic code, is text formatting; Dynamic link library can call execution by other part for compiling the water analysis algorithm file of completion; In the dynamic link library, wherein a part is the embedded water-quality guideline warning of system, water quality assessment, water quality prediction and water quality early-warning algorithm, and another part is the water analysis algorithm that generates according to the User Defined algorithm.
D. result of calculation storehouse: be used to store and accomplish the calculation result data that obtains behind the individual event calculation task by calculation server, like evaluation result, predict the outcome, early warning result etc., for the service that provides is used in various water analyses.
(2) application service layer is the logical layer between client layer (Web client) and the data service layer, is responsible for the realization of main business logic, comprising:
A. calculation server: be used to provide the water analysis calculation services; According to the mission bit stream in the calculation task storehouse; Automatically update calculation service queue, obtain corresponding water quality data, call corresponding water analysis algorithm, accomplish the water analysis calculation task, calculation result data is saved to the result of calculation storehouse.
B. on-the-flier compiler server: be used to provide the compiling service of self-defined water analysis algorithm; Through obtaining the code text in the water analysis algorithms library; Invoke code compiler interface carries out on-the-flier compiler to text codes, is saved to the water analysis algorithms library after generating new dynamic link library.
(3) client layer (being also referred to as the Web client tier) is used for calculation result data is presented to the user, realizes the management of user to calculation task and algorithm that it is through the user end to server request msg, then with certain form display result.Following functional unit mainly is provided:
A. result of calculation display unit: adopting different visual means such as form, figure, curve, map to show water analysis result of calculation to the user, is water quality monitoring early warning service.
B. calculation task administrative unit: user interface is provided, realizes management calculation task, comprise to calculation task newly-built, delete, edit, start, forbid, operation such as execution immediately.
C. water analysis algorithm management unit: user interface is provided; Realize water analysis algorithm DLL management (newly-built, deletion, editor's water analysis algorithm DLL) and the management of water analysis algorithmic code (newly-built, deletion, editor, compile water analysis algorithm text codes); Wherein water analysis algorithmic code compilation facility carries out on-the-flier compiler through calling the on-the-flier compiler server to code; Generate new dynamic link library or upgrade already present dynamic link library, and real-time update water analysis algorithms library.
Core content of the present invention is calculation server and on-the-flier compiler server; Wherein the on-the-flier compiler server is realized programme the voluntarily water analysis algorithmic code text of input of user is carried out on-the-flier compiler; The generation dynamic link library is also stored, is shared; Can be all kinds of water analysis work services, improved the deficiency of conventional water quality monitoring equipment and the embedded algorithm of water quality monitoring system, fixed arithmetic, improved the dirigibility and the opening of water analysis greatly; Calculation server realizes that the water analysis Algorithm in Remote of multitask, multithreading is called and calculating in real time; The water quality data analysis result that obtains supplies user's decision analysis to use; Can serve a large number of users but not the sole user, improve the networked level and the automatization level of water quality monitoring system greatly.
The know-why of the calculation server among the present invention is following:
(1) calculation server comprises calculation services engine (as shown in Figure 2), calculation task management engine, calculation services watch-dog, data, services engine four parts.
(2) the calculation services engine adopts the multithreading treatment technology to realize the multitask calculating of water analysis service, mainly is made up of daemon thread and two threads of main thread.Daemon thread periodic queries calculation task storehouse wherein; When a certain registered task in the calculation task storehouse satisfies (execution) condition of triggering; Generate new calculation task thread information and the calculation task formation that is pressed into automatically in the internal memory and rank, the calculation task thread packets of information in the calculation task formation is drawn together Thread Id, thread handle, thread state, corresponding task ID, thread creation time and thread maximum working time etc.; Main thread extracts the computational threads information in the calculation task formation; Generate new computational threads instance; This computational threads instance calls corresponding algorithm and water quality data and calculates according to corresponding mission requirements, after calculating is accomplished; The calculation services engine is nullified this thread, simultaneously update calculation task library information.
(3) the calculation task management engine is used to realize the management to calculation task.The user calls this engine and accomplishes the operations such as registration, editor and cancellation to calculation task through the calculation task administrative unit.The user fills in the task relevant information in client; Comprise task names, task type, task status, task performance period, task creation time, working time next time, working time last time, corresponding algorithm ID, corresponding monitoring point ID contents such as (data sources); Form with XML sends to the calculation task management engine, after this engine is received user's registration information, log-on message is resolved; Newly-increased task in the calculation task storehouse, the registration process of completion calculation task.When the user need nullify the correlation computations task; The calculation task ID that needs cancellation in the client submission; The calculation task management engine is deleted the corresponding calculation task in the calculation task storehouse, and log off procedure record is write service log database put on record (as shown in Figure 3).
(4) the calculation services watch-dog is used for the ruuning situation of calculation services engine is monitored in real time, ensures the stability of calculation services.The state of computational threads instance comprises ready state, suspended state, halted state, running status and ERST in the calculation services watch-dog quantitative check internal memory.For preventing that calculation task is in the running status occupying system resources for a long time because of operation exception, through limiting the task run time, calculation task surpass set working time after by force aborting task carry out.
(5) the data, services engine is used to provide database is reused interface operable.Calculation server need carry out frequent a large amount of operation to database; Be the degree of coupling and the reusability that reduces various operations, in addition in view of the multi-source heterogeneous property in water quality data storehouse, according to water analysis actual needs and the design specifications requirement of water quality data storehouse; Design unified data access interface supplies other parts to call; The encapsulation of data access logic, fulfillment database visit independence, the integrality of protected data.
The know-why of the on-the-flier compiler server (as shown in Figure 4) among the present invention is following:
(1) the on-the-flier compiler server comprises on-the-flier compiler controller, code encoder, data, services engine three parts.
(2) the on-the-flier compiler controller compiling parameter that is used for providing according to user instruction and user realizes the complete on-the-flier compiler process of water analysis algorithm.At first, according to user instruction and compiling parameter, through the invoke code compiler, the water analysis algorithmic code that the user is provided carries out on-the-flier compiler, obtains the compiling result; Then, keep watch on the state of code encoder, wrong if the compiling result returns, then return error condition notice user's modification code; At last, move test, if return results is wrong, then return error condition notice customer inspection code, if the return results success then will compile the dynamic link library file of accomplishing and be saved in the water analysis algorithms library to compiling successful on-the-flier compiler algorithm.
(3) code encoder is used for to the compiling of water analysis algorithm executive's interface being provided.Code encoder is accepted the steering order of on-the-flier compiler controller; After obtaining the water analysis algorithmic code, call inner code generator and code encoder, the compiling result that generation needs; Then whether successful compiling generates dynamic link library, and return on-the-flier compiler result.
(4) the data, services engine is used to provide the interface to the database accessing operation.Set up the unified data access interface and supply to call, encapsulation of data access logic, fulfillment database visit independence, the integrality of protected data.
The present invention adopts the B/S structure, has platform-neutral, and retractility is big, ease for use good, the characteristics that be easy to safeguard, the information sharing degree are high, extendability is good and security is good.This pattern has been unified client, and the core that the service platform function is realized focuses on the server, has simplified exploitation, maintenance and the use of service platform.
Description of drawings
Fig. 1 is a system level configuration diagram of the present invention.
Fig. 2 is a calculation services engine principle schematic of the present invention.
Fig. 3 is the calculation task running status synoptic diagram of calculation services engine.
Fig. 4 is an on-the-flier compiler engine principle schematic of the present invention.
Fig. 5 is the workflow diagram of on-the-flier compiler engine.
Embodiment
Below in conjunction with specific embodiment, further explain the present invention.Should be understood that these embodiment to be used to the present invention is described and be not used in the restriction scope of the present invention.
The specific embodiment of the invention adopts B/S (browser/server) three-layer network structure construction water analysis calculation services system, comprises data service layer, application service layer and client layer.
The system of the specific embodiment of the invention realizes adopting the ASP.NET programming framework..NET be Microsoft XML Web services platform.XML Web services allows application program to carry out communication and shared data through Internet, and no matter what adopted is which kind of operating system, equipment or programming language.Microsoft .NET platform provide create XML Web services and with these services integrate required..NET framework is to language-neutral.At present, it supports C++, C#, Visual Basic, JScript (Microsoft's version of JavaScript) and COBOL etc.ASP.NET is the network programming structure among the .NET, and it is very convenient and efficient that it makes construction, operation and delivery network use.Support multilingual among the ASP.NET, all language of CLR support can use in ASP.NET.ASP.NET utilizes forms and Javascript script to stash the TRANSFER MODEL of incident dexterously, has realized that the developer uses the method for event-driven formula program development pattern to develop webpage and application program.
The database of the specific embodiment of the invention adopts Microsoft SQL 2005.
The ICodeCompiler compiler executive's interface that the compiler interface that the specific embodiment of the invention adopts provides for .NET Framework.
Specific embodiment of the present invention is following:
(1) adopt Microsoft SQL 2005 design background data bases, set up Relational database list files such as water quality data storehouse, calculation task storehouse, water analysis algorithms library, result of calculation storehouse, wherein:
A. the water quality data storehouse mainly comprises water quality data monitoring form, water quality monitoring station information table, hydrology tables of data, weather data table etc., and wherein the water quality data monitoring form mainly comprises monitor value coding, monitoring station coding, counts and adopt fields such as appearance coding, on-line monitoring instrument coding, water sample coding, water sample type, sampling time, sampling environment, factor coding, monitor value, monitoring time, uplink time; Water quality monitoring station information table mainly comprises monitoring station coding, monitoring station title, position, monitoring station, monitoring station x coordinate, monitoring station y coordinate, affiliated city name, affiliated province name, water sample type, affiliated unit's type, affiliated function's coding, date created; B. the calculation task storehouse mainly comprises calculation task table, task queue table etc.Wherein the calculation task table comprises task names, task type, task status, task performance period, task creation time, working time next time, working time last time, corresponding algorithm ID, corresponding monitoring point contents such as (data sources);
C. the water analysis algorithms library mainly comprises water analysis algorithmic code text table and water analysis algorithm dynamic link library table.
D. the result of calculation storehouse mainly comprise the evaluation result table, table, the early warning table etc. as a result that predicts the outcome, be used to store and accomplish the calculation result data that obtains behind the individual event calculation task by calculation server.
(2) adopt ASP.NET to set up water analysis calculation services system, result of calculation display unit, calculation task administrative unit, the water analysis algorithm management unit of exploitation client layer based on Web.(3) adopt the reflection calling technology of C# language to realize calculation server, so that multithreading, multitask water analysis calculation services function to be provided.C# language has complete object-oriented, it is distributed, healthy and strong to support, interpolation is to the characteristics such as support, safety, portable and suitable assembly exploitation of pointer.The System.Threading.ThreadPool class of C# has realized thread pool; And the serial of methods in management thread pond is provided; And the class of the System.Reflection.Emit NameSpace of C# provides a kind of reflection of special shape, can when operation, generate type.Calculation server utilization reflection calling technology realizes that the principle of calculation services is described below:
A. at first through the transmission of parameter, needing to obtain the water analysis algorithm dynamic link library that loads path and dynamic link library title DllName with serve typonym ServiceName.Transmit parameter DllName, LoadFile (DllName) method of calling Assembly loads dynamic link library DllName, obtains the instance AssExample of Assembly;
B. transmit parameter S erviceName, call GetType (ServiceName) method of Assembly, instantiation Service class: Service SExample=GetType (ServiceName) obtains the instance SExample of ServiceName;
C. generate new computational threads, computational threads is pressed in the formation.This thread is after obtaining the SExample instance, and call method Analysis () accomplishes the computational analysis service, simultaneously, information such as this this task run time, the ID that utilizes the dynamic generation of MD5 algorithm, task names is write DB Backup;
D. whether the return results carried out of determination methods is correct, and whether unusual, if return results is wrong if perhaps having dished out in the implementation; Then the corresponding error result is write database; Perhaps, the abnormal information of dishing out is write database, accomplish error processing procedure.
The use of reflex mechanism makes the water analysis calculation services realize component-based development; The water analysis algorithm is encapsulated in the dynamic link library; When adding a new algorithm, dynamic link library is added in the database, just can accomplish the expansion of service through disposing corresponding task run information; When deleting a new algorithm,, and corresponding mission bit stream is nullified the deletion that just can accomplish service at database with the dynamic link library deletion.
(4) adopt the ICodeCompiler compiler executive's interface of C# language to develop the on-the-flier compiler server, so that the on-the-flier compiler function of User Defined code to be provided.Dynamic compilation techniques can be in system's operational process on-the-flier compiler and carry out the valid code of user's input, generate corresponding application or DLL.Dynamic compilation techniques is a kind of technology very flexibly that C# provides; Mainly expand existing application program through some additional code; In order to the complicated and unforeseen emergency condition of reply in real time, on-the-fly modify when perhaps moving and add the function of some characteristic of system with enhanced system in system.
The on-the-flier compiler process of C# is mainly accomplished by class CSharpCodeProvider, ICodeCompiler, CompilerParameters, CompilerResults and the Assembly that C# provides.
Utilize the on-the-flier compiler server to realize on-the-flier compiler concrete steps (as shown in Figure 5) as follows:
A. call the code text that the data, services engine interface obtains target water analysis algorithm;
B. state the CSharpCodeProvider object, be used to visit the instance of C# code generator and code encoder; Utilize the parameter of the invoked compiler of CompilerParameters object modification, with the compiling result of generation needs;
C. use the CompileAssemblyFromSource method of CSharpCodeProvider object to compile generation DLL;
D. obtain compiling the result by the CompilerResults object and judge whether to compile successfully, the compiling failure then notifies user's failure cause to recompilate.
Have very big risk because system carries out the on-the-flier compiler of algorithm, malicious code can bring instability to system, therefore need carry out prerun after the compiling and handle.After requiring the user to import compiling request, compiler server responds request, and through setting the working time of prerun, whether the monitoring algorithm is accomplished at the appointed time smoothly, and guaranteeing does not have malicious code to cause endless loop in the personal code work; And the maximum memory of setting program operation, whether the monitoring facilities operation takies the maximum memory that surpasses regulation, guarantees that system normally moves.Operation does not impact the water analysis algorithm of importing through prerun guarantee user to system.
Claims (10)
1. water analysis calculation services system that supports on-the-flier compiler; It is characterized in that: adopt B/S (browser/server) three-layer network structure; Comprise data service layer, application service layer and client layer; Wherein data service layer comprises water quality data storehouse, calculation task storehouse, water analysis algorithms library, result of calculation storehouse; Application service layer comprises calculation server, on-the-flier compiler server, and client layer comprises water analysis result of calculation display unit, water analysis calculation task administrative unit, water analysis algorithm management unit.
2. like claims 1 described calculation task storehouse; It is characterized in that: be used to store water quality analytical calculation task, comprise task names, task type, task status, task performance period, task creation time, working time next time, working time last time, corresponding algorithm ID, corresponding monitoring point contents such as (data sources); The water analysis calculation task is meant and utilizes water quality data to certain particular analysis purpose, according to water analysis algorithm or water analysis model, to water quality estimate, prediction, early warning and acquire knowledge property result's process.
3. like claims 1 described water analysis algorithms library; It is characterized in that: with code text and two kinds of stored in form water analyses of dynamic link library algorithm; Wherein code text is user-defined, to be compiled water analysis algorithmic code, is text formatting; Dynamic link library can call execution by other part for compiling the water analysis algorithm file of completion.
4. like claims 1 described result of calculation storehouse; It is characterized in that: be used to store and accomplish the calculation result data that obtains behind the individual event calculation task by calculation server; Like evaluation result, predict the outcome, early warning result etc., for the service that provides is used in various water analyses.
5. calculation server as claimed in claim 1; It is characterized in that: be used to provide the water analysis calculation services; According to the mission bit stream in the calculation task storehouse; Automatically update calculation service queue, obtain corresponding water quality data, call corresponding water analysis algorithm, accomplish the water analysis calculation task, calculation result data is saved to the result of calculation storehouse.
6. on-the-flier compiler server as claimed in claim 1; It is characterized in that: be used to provide the compiling service of self-defined water analysis algorithm; Through obtaining the code text in the water analysis algorithms library; Invoke code compiler interface carries out on-the-flier compiler to text codes, is saved to the water analysis algorithms library after generating new dynamic link library file.
7. dynamic link library file as claimed in claim 7, wherein a part is the embedded water-quality guideline warning of system, water quality assessment, water quality prediction and water quality early-warning algorithm file, another part generates according to the on-the-flier compiler of User Defined algorithm.
8. result of calculation display unit as claimed in claim 1 is characterized in that: adopt different visual means such as form, figure, curve, map to show water analysis result of calculation to the user, be water quality monitoring early warning service.
9. calculation task administrative unit as claimed in claim 1 is characterized in that: user interface is provided, realizes management calculation task, comprise calculation task newly-built, delete, edit, start, forbid, operation such as execution immediately.
10. water analysis algorithm management as claimed in claim 1 unit; It is characterized in that: user interface is provided; Realize water analysis algorithm DLL management (newly-built, deletion, editor's water analysis algorithm DLL) and the management of water analysis algorithmic code (newly-built, deletion, editor, compile water analysis algorithm text codes); Wherein water analysis algorithmic code compilation facility carries out on-the-flier compiler through calling the on-the-flier compiler server to code; Generate new dynamic link library or upgrade already present dynamic link library, and real-time update water analysis algorithms library.
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| CN108920335A (en) * | 2018-08-06 | 2018-11-30 | 任民民 | A kind of real-time system and method for calculating business datum |
| CN111225034A (en) * | 2019-12-19 | 2020-06-02 | 中国科学院南京地理与湖泊研究所 | WebService-based dynamic integration method and assembly of water environment safety regulation and control model |
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| CN112700141B (en) * | 2020-12-30 | 2021-11-19 | 哈尔滨工业大学 | Online analysis method for municipal drainage pipe network |
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