CN104484476B - A kind of pumping-unit workdone graphic data compression storage method and device - Google Patents
A kind of pumping-unit workdone graphic data compression storage method and device Download PDFInfo
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- CN104484476B CN104484476B CN201410852292.1A CN201410852292A CN104484476B CN 104484476 B CN104484476 B CN 104484476B CN 201410852292 A CN201410852292 A CN 201410852292A CN 104484476 B CN104484476 B CN 104484476B
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- G06F16/20—Information retrieval; Database structures therefor; File system structures therefor of structured data, e.g. relational data
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Abstract
The application provides a kind of pumping-unit workdone graphic data compression storage method and device, which comprises S1: obtaining indicator card data, calculates the difference data for obtaining adjacent data in the indicator card data；S2: the difference data in the difference data in preset value range is chosen as normal difference；S3: the data of the normal difference will be removed in the difference data as special difference；S4: source point data in the indicator card data are stored；Successively store the number of the special difference, the position of special difference and data value；Step-by-step successively stores the data of the normal difference.Using the embodiment in the application, indicator card data lossless storage can be carried out into real-time data base, save memory space and maintenance cost.
Description
Technical field
The application belongs to production of hydrocarbons technical field of data processing more particularly to a kind of pumping-unit workdone graphic data compression is deposited
Method for storing and device.
Background technique
At present in the oil gas field production on China mainland frame most of oil well using rod-pumped well.To on pumping unit
Creation data carry out acquisition in real time and can form pumping-unit workdone graphic, by computer disposal to indicator card data and point
Analysis can remotely monitor rod-pumped well, Diagnosis of Work Conditions and oil well industry liquid producing amount measure.Since the technical maturity is high,
The change to traditional mode of production mode can be achieved, reduce cost of labor, improve production efficiency, the technology is in Petroleum Production in recent years
It has been rapidly developed and has been widely used.
After acquiring indicator card data, it usually needs real-time storage is carried out, convenient for being monitored in real time, being diagnosed to pumping unit
With analysis etc..Typical indicator card refers to that the influence of a certain factor is fairly obvious, and shape represents basic under the influence of the factor
The indicator card of feature.In the case of practical production of hydrocarbons, there are many shape that factor influences indicator card, some of them factor influences special
It is not strong.So the shape of indicator card also just reflects the feature under the influence of principal element, therefore, using indicator card in difference
The feature showed under the influence of factor can carry out Production rate and accident analysis.In the indicator card data usually acquired,
Every width indicator card data need to store load and displacement respectively, and about 200-300 real number of every group of data acquires 500 numbers altogether
According to left and right, each real number usually requires that remain into decimal point after 6.Generally use real-time data base in the prior art come to showing function
Diagram data is directly stored, and every group of indicator card takes around 500 real numbers and usually require that one more than half an hour could be acquired
Group data.Real-time data base is charged by points at present, and price each data point in market is charged at least 30 yuan at present, a well
Just need to put into 1.5 ten thousand yuan come buy real-time data base carry out the storage of indicator card data, and each operation area generally include it is several hundred
Mouth well, this expense is very high.
In order to solve the cost issues of real-time data base, common practice is using relational database come to indicator card at present
Data are stored.This method will at least dispose a database server in each operation area, and install a set of relation data
Library, about 100,000 yuan of every set cost.But the storage method still has two problems: (1) carrying out reality using relational database
When data processing, processing speed is slower than real-time data base very much, is connected with data processing software SCADA and is counted
According to conversion, it is unfavorable for in-situ analysis；(2) this storage mode cost is also very high, if coming according to 200 mouthfuls of each operation area well
It calculates, each operation invests 100,000 yuan, and only middle petroleum is all implemented just at least to need 100,000,000 yuan.
The indicator card data volume for acquiring storage in the prior art is big, and real-time data base stores cost and relational database storage
Equipment cost is all very high, increases oil field and opens data storage production cost and server stores resources, also reduces the later period
Reading data such as calls, synchronizes at the processing speeds.
Summary of the invention
The application is designed to provide a kind of pumping-unit workdone graphic lossless date-compress storage method and device, can will show
Function diagram data be effectively compressed storing into real-time data base, can be with speed up processing, can also be with save the cost.
A kind of pumping-unit workdone graphic data compression storage method provided by the present application and device are achieved in that
A kind of pumping-unit workdone graphic data compression storage method, which comprises
S1: obtaining indicator card data, calculates the difference data and source point number for obtaining adjacent data in the indicator card data
According to；
S2: the difference data in the difference data in preset value range is chosen as normal difference；
S3: the data of the normal difference will be removed in the difference data as special difference；
S4: the source point data of the indicator card data are stored；Successively store the number of the special difference, special difference
Position and data value；
Step-by-step successively stores the data of the normal difference.
A kind of device for realizing pumping-unit workdone graphic compression storing data, described device include:
Data acquisition module obtains indicator card data, calculates the difference number for obtaining adjacent data in the indicator card data
According to；
Normal difference module, for being arranged the preset value range of normal difference, and according to the preset value range from
Normal difference data are chosen in the difference data；
Special difference block, the special difference of data acquisition for removing the normal difference from the difference data；
Memory module, for storing source point data in the indicator card data；Successively store the special difference number,
The position of special difference and data value,
It is also used to the data that step-by-step successively stores the normal difference.
In a kind of pumping-unit workdone graphic data compression method and apparatus provided by the present application, indicator card data can be sought
Then difference data and source point data indicate that normal difference, then step-by-step are successively deposited with particular number of bits such as five bit binary datas
Store up the normal difference data.In this way data storage method can be ensured when by the way of real-time data base data information without
Damage and reducibility on the basis of compress indicator card data, save fund cost while, moreover it is possible to save server stores resources,
Data transfer bandwidth etc..
Detailed description of the invention
In order to illustrate the technical solutions in the embodiments of the present application or in the prior art more clearly, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
The some embodiments recorded in application, for those of ordinary skill in the art, in the premise of not making the creative labor property
Under, it is also possible to obtain other drawings based on these drawings.
Fig. 1 is a kind of a kind of method flow signal of embodiment of pumping-unit workdone graphic data compression storage method of the application
Figure；
Fig. 2 is a kind of schematic diagram of storage mode of indicator card data compression storage method described in the present embodiment；
Fig. 3 is a kind of modular structure schematic diagram for the device for realizing pumping-unit workdone graphic compression storing data of the application；
Fig. 4 is a kind of module knot for the device another kind embodiment for realizing pumping-unit workdone graphic compression storing data of the application
Structure schematic diagram.
Specific embodiment
In order to make those skilled in the art better understand the technical solutions in the application, below in conjunction with the application reality
The attached drawing in example is applied, the technical scheme in the embodiment of the application is clearly and completely described, it is clear that described implementation
Example is merely a part but not all of the embodiments of the present application.Based on the embodiment in the application, this field is common
The application protection all should belong in technical staff's every other embodiment obtained without creative efforts
Range.
In existing embodiment, can on pumping unit installed load sensor and displacement sensor, can acquire in real time
To one group of indicator card data, indicator card is the envelope being made of load with the variation relation curve of displacement in the indicator card data
Closed curve figure, such as indicate that the indicator card of oil pumping machine polished rod load and displacement relation is known as surface dynamometer card or polished rod indicator card.
It is analyzed and is practiced based on a large amount of indicator card data, present applicant proposes one kind to be adapted to scene indicator card data actually required
The method being stored in real-time data base.
Fig. 1 is a kind of method stream of data compression storage method one embodiment of pumping-unit workdone graphic provided by the present application
Cheng Tu.As shown in Figure 1, a kind of data compression storage method of pumping-unit workdone graphic may include:
S1: obtaining indicator card data, calculates the difference data and source point number for obtaining adjacent data in the indicator card data
According to.
As set forth above, it is possible to by the load transducer and displacement sensor that are mounted on the oil-extractor polish-rod, acquisition
Obtain indicator card data.Usually in data acquisition, show using collected first load or displacement data as the group
The source point data (Source Date, SD) of function diagram data, can indicate the initial data of this group of indicator card data.The acquisition
Indicator card data can be the real number with certain acquisition precision data point, each data point have corresponding load and
Shift value generallys use binary mode and carries out data record.During data acquisition, when usually being acquired according to data
Between sequencing carry out arrangement storage.
The indicator card data of acquisition usually also need to remove wrong data therein.According to great amount of samples data in the application
Analysis, the data of every group of indicator card data 3/about thousand. nine are since data acquisition device failure or unusual fluctuations are drawn
The wrong data risen.The wrong data can be obtained by plot analysis, the characteristic one of the wrong data of the usual formation
As be all consistent or pattern fits after be not present normal indicator diagram the case where.To improve data compression and saving precision,
These wrong data can be removed.
The indicator card data of the acquisition usually have certain acquisition precision, usually require that after remaining into decimal point six.
The precision that can receive can also be determined in data compression and storage.In the present embodiment, for the number for ensureing data storage
According to certain requirement is reached, the indicator card data precision of the acquisition can be set at least need to be saved in one decimal place small
Number.
After obtaining the indicator card data, the difference of adjacent data in the indicator card data can be successively calculated, such as
Second data subtracts first data, and third data subtract second data, and so on, the available indicator card
The difference data (Different, Value, DV) of data.The difference data of the acquisition has sign bit, can identify the difference
Value Data is positive value or negative value.Certainly, the latter data can also be subtracted using previous data when adjacent data subtracts each other to obtain
Difference data is taken, the symbol of the difference data is opposite with the symbol for the difference data that aforesaid way subtracts each other acquisition at this time.
S2: the difference data in the difference data in preset value range is chosen as normal difference.
Due to certain variation tendency or rule of conversion that the indicator card data that acquisition obtains usually have, in adjacent data
Subtract each other often to have certain difference datas in the difference data of acquisition and be repeated several times and occur, and the difference that appearance is repeated several times
Value Data is always maintained in certain numerical value regional scope.Therefore the repeatability that the application can use the difference data carries out
Compression storing data.
In data compression process, data redundancy is higher, and the number of repeated data is more, and compression efficiency is higher.This
Can be a preset value range for presetting the higher difference of the frequency of occurrences in embodiment, by the difference data
Normal difference (Normal Defferent of the difference data as the indicator card data in the preset value range
Value, NDV).Specifically choose the normal difference preset value range can according to field samples data or empirical value or
Data compression demand is configured.Under normal conditions, the numerical value of Data duplication comparatively collects neutralization surely in the difference data
Fixed, the preset value range can be set relatively narrow, and the numberical range of the Data duplication is comparatively dispersed, described preset to take
Value range can be set wider.A kind of setting method of normal difference is provided in the present embodiment, the preset of the selection takes
Normal difference within the scope of value may include the normal difference data indicated using the binary data of predetermined figure, described predetermined
The the first of the binary data of digit indicates sign bit.Such as the number for the normal difference that can be indicated using five bit binary datas
According to range, five binary first places can be expressed as sign bit, naturally it is also possible to use six or other digits two
The data area that system indicates.
A kind of setting method of preset value range is provided in the present embodiment.It is common, to ensure in data storage
Normal difference reaches certain quantity, and preset value range can be set, by mass data sample analysis, in the present embodiment
In, the preset value range may include: the interval range including 90% above data in the difference data of setting.
Data in the preset value range can account for 90% or more of the difference data.Such as a total of 300 difference datas,
The preset value range being arranged can be [- k, k], wherein having 290 difference datas described pre- in 300 difference datas
It sets in value range [- k, k] range, the normal difference data account for the 97% of the difference data.
S3: the data of the normal difference will be removed in the difference data as special difference.
After obtaining the normal difference in the difference data, it is described normal poor to remove from by the difference data
Remaining data are stored as feature difference (Special Different Value, SDV) after value.The feature difference
The difference set of the difference data DV Yu the normal difference NDV can be considered as.Such as 300 difference numbers described in above-mentioned S2
10 difference datas of residue after removing 290 normal difference data in are as special difference.
S4: source point data in the indicator card data are stored；Successively store the number of the special difference, special difference
Position and data value；
Step-by-step successively stores the data of the normal difference.
After calculating the difference data, normal difference, special difference data for obtaining the indicator card data, it can store described
The data of the source point data of indicator card data, special difference and the normal difference.The source point data of the indicator card data
It can obtain and learn when obtaining the indicator card data, the source point data usually can be first stored in the application, indicating should
The beginning data value of group indicator card data facilitates the extraction of follow-up data, uses.Then the normal difference data be can store
With special difference data.Such as it first character section elder generation's storage source can count in storing data library in above-mentioned data storage procedure
According to SD, number, position and the data value of special difference SDV are then successively stored, then step-by-step successively stores the normal difference
NDV, wherein the first place of each normal difference is sign bit.The step-by-step storage, may include that will indicate that indicator card is normally poor
The binary data bit-by-bit position of the particular number of bits of Value Data is stored, such as normal difference 13 can use five binary systems
01101, wherein first " 0 " is sign bit, indicate that the normal difference 13 is a positive value.
It is analyzed by great amount of samples data, in general, to generally remain in a comparison steady for the normal difference of indicator card data
Determine in interval range, the storage method of former indicator card data in the prior art corresponding to these normal differences is a data
At least store a byte.Special difference is the difference data outside the normal difference range, usually reflects to be indicator card
Abnormal or mutation data in data (be usually expressed as greatly or minimum), indicator card number corresponding to such special difference
According in one group of indicator card data proportion it is less.Therefore, the application first seeks the difference data and source point of indicator card data
Then data indicate normal difference with for example above-mentioned five bit binary data of particular number of bits, then step-by-step successively store it is described normal
Difference data.Data storage method can compress indicator card number on the basis of ensureing lossless data information and reducibility in this way
According to while saving fund cost, moreover it is possible to server stores resources, data transfer bandwidth etc. are saved, it can be with further genralrlization oil
Sturdy basis has been established in the Internet of Things construction of gas production.
Fig. 2 is a kind of schematic diagram of storage mode of indicator card data compression storage method described in the present embodiment.Such as
Shown in Fig. 2, the difference data that can will acquire every group of indicator card data of volume in the present embodiment, which is divided into three kinds of data types, to be carried out
Storage, it can be divided into source point data SD, special difference SDV, normal difference NDV.In storing process, the first of storage unit
Byte position can first storage source point data SD, then can successively special difference number (No of SDV), the special difference
Position (Pos) and data value (Val) data.Store normal difference data NDV again, the first place of each normal difference can be with
It is set as sign bit, if storing multiple normal differences, the normal difference can be successively stored according to bit.
Certainly, in data convert, source point data SD can be first obtained, further according to number (the No of for storing special difference
SDV) and the position (Pos) of each special difference and the special difference data of data value (Val) data convert, remaining data bit
Normal difference can successively be filled up by setting, and can restore difference data, and then first source point data is according to the difference of the reduction
Data can successively obtain the indicator card data of each data point, realize the reduction of indicator card data.
After indicator card data being stored by method described above, may be implemented the lossless compression of indicator card data.
Specific storage location can include but is not limited in described among the above real-time data base or relational database, other storages
Data storage described herein also may be implemented in server or the storage service being specially arranged.By the application method into
Occupied memory space M can be calculated using following formula after the storage of row data:
In formula, N can indicate one group of indicator card difference data number, and n can indicate the number of special difference, LSDIt can be with
Indicate digit shared by source point data, PSDV(i) digit shared by the position data of i-th of special difference, L can be expressed asSDV
(i) digit shared by the data value of i-th of special difference, L can be expressed asNDV(i) number of i-th of normal difference can be indicated
The shared digit of value.Source point data SD, special difference SDV and tri- kinds of numbers of normal difference NDV can be calculated by above-mentioned formula
According to memory space occupied after storage, available this group of indicator card data of then summing pass through institute after the application storage method
The total memory space occupied.
By the description of the above method, the general memory space for needing 3 real-time data base points stores a width indicator card
Sample data.The following table 1 is using the present invention under multiple oil field available data acquisition conditions, to a large amount of indicator card numbers of acquisition
It according to the study and tests, discovery displacement data repeatability is higher, so the principle that use space is shared, data can further be pressed
One width indicator card data can be stored in 2 real-time data base points by contracting.Even in the worst case, that is, rejecting mistake
After data, the number of special difference is still more, in the lesser situation of normal difference amount of storage using five binary representations,
Load data memory space can occupy 179.2 bytes in every group of indicator card data, and displacement data can occupy 71.25 words
Section, every group of indicator card data load and displacement occupy 250.45 bytes in total.And stored even with real-time data base,
Each real-time data base can store 128 bytes in existing scheme, therefore, based on the prior art acquisition indicator card data,
After herein described storage method, it can be stored in one group of indicator card data using two real-time data base points, saved significantly
About fund cost and resource consumption.
The indicator card data of 1 sample data of table analysis store occupied space
The following table 2 is in terms of software and hardware configuration, direct investment cost, memory space occupancy, resource consumption to of the invention
The comparative analysis that application effect carries out.
2 the method for the present invention actual field application effect contrast table of table
Server stores resources can be greatlyd save using herein described method it can be seen from upper table 2, save oil gas
Production automation capital investment brings positive benefit for actual industrial production application.
Based on a kind of pumping-unit workdone graphic data compression storage method described herein, the application provides a kind of realization pumping
The device of oil machine indicator card compression storing data, Fig. 3 are a kind of herein described realization pumping-unit workdone graphic compression storing datas
Device modular structure schematic diagram, as shown in figure 3, the apparatus may include:
Data acquisition module 101, available indicator card data calculate and obtain adjacent data in the indicator card data
Difference data；
Normal difference module 102 can be used for being arranged the preset value range of normal difference, and according to the preset value
Range chooses normal difference data from the difference data；
Special difference block 103, the data acquisition that can be used for removing from the difference data normal difference are special
Different difference；
Memory module 104 can be used for storing source point data in the indicator card data；Successively store the special difference
Number, special difference position and data value,
It is also used to the data that step-by-step successively stores the normal difference.
The preset value for the normal difference that indicator card data storage device described above is arranged in normal difference module 102
Range may include the normal difference data indicated using the binary data of predetermined figure, the binary number of the predetermined figure
According to the first indicate sign bit.Specifically the normal difference data of the binary data expression of the predetermined figure may include:
Using the data area for the normal difference that five bit binary datas indicate, correspondingly, the first place of five bit binary data is
Sign bit.
Fig. 4 is a kind of another embodiment of herein described device for realizing pumping-unit workdone graphic compression storing data
Modular structure schematic diagram, as shown in figure 4, described device can also include:
Precision processing unit 1011, can be used for be by the indicator card data processing that the data acquisition module 101 obtains
Meet pre-set data precision requirement.The pre-set data precision requirement can be according to actual data storage and pressure
Contracting demand is configured, and the data precision requirement being located in advance described in the present embodiment can be set to be saved in decimal point at least
Latter position decimal.
In another embodiment, the preset value range of the normal difference being arranged in the normal difference module 102 can be with
Include:
What is be arranged includes the interval range of 90% above data in the difference data.
It, can be by indicator card number using a kind of device for realizing pumping-unit workdone graphic compression storing data described herein
It is stored according to three kinds of data are divided into, the digit of the normal difference data chosen according to preset value range is typically less than
Normal difference data can be carried out step-by-step in the application and successively stored, can save memory space by the digit of one byte.
Method described herein can retouch in the general context of computer-executable instructions executed by a computer
It states, such as program module.Generally, program module include routines performing specific tasks or implementing specific abstract data types,
Programs, objects, component, data structure, class etc..The application can also be practiced in a distributed computing environment, in these distributions
Formula calculates in environment, by executing task by the connected remote processing devices of communication network.In distributed computing environment
In, program module can be located in the local and remote computer storage media including storage equipment.
As seen through the above description of the embodiments, those skilled in the art can be understood that the application can
It realizes by means of software and necessary general hardware platform.Based on this understanding, the technical solution essence of the application
On in other words the part that contributes to existing technology can be embodied in the form of software products, the computer software product
It can store in storage medium, such as ROM/RAM, magnetic disk, CD, including some instructions are used so that a computer equipment
(can be personal computer, mobile terminal, server or the network equipment etc.) executes each embodiment of the application or implementation
Method described in certain parts of example.
Each embodiment in this specification is described in a progressive manner, the same or similar portion between each embodiment
Dividing may refer to each other, and each embodiment focuses on the differences from other embodiments.Although passing through embodiment
The application is depicted, it will be appreciated by the skilled addressee that there are many deformations and the essence changed without departing from the application by the application
Mind, it is desirable to which the attached claims include these deformations and change without departing from spirit herein.
The present invention can be used for the storage of pumping-unit workdone graphic data, thought be stored based on data of the invention, without creating
Property labour on the basis of carry out other variation and deformation date storage methods all should belong to the application model claimed
It encloses.
Claims (11)
1. a kind of pumping-unit workdone graphic data compression storage method, characterized by comprising:
S1: obtaining indicator card data, calculates the difference data and source point data for obtaining adjacent data in the indicator card data, will
The source point data of collected first load or displacement data as one group of indicator card data；
S2: the difference data in the difference data in preset value range is chosen as normal difference；
S3: the data of the normal difference will be removed in the difference data as special difference；
S4: the source point data of the indicator card data are stored；Successively store the number of the special difference, the position of special difference
And data value, comprising: first store the source point data, indicate the beginning data value of this group of indicator card data, then described in storage
Normal difference data and special difference data, in data storage procedure, the first character section elder generation storage source in storing data library
Point data SD, then successively stores number, position and the data value of special difference SDV, then step-by-step successively store it is described normal poor
Value NDV, wherein the first place of each normal difference is sign bit, the step-by-step storage, including will indicate indicator card normal difference
The binary data bit-by-bit position of the particular number of bits of data is stored；
Step-by-step successively stores the data of the normal difference.
2. a kind of pumping-unit workdone graphic data compression storage method as described in claim 1, it is characterised in that the selection
Normal difference data are as follows:
The normal difference data indicated using the binary data of predetermined figure, the first place of the binary data of the predetermined figure
Indicate sign bit.
3. a kind of pumping-unit workdone graphic data compression storage method as claimed in claim 2, it is characterised in that described using pre-
The normal difference data that the binary data of positioning number indicates include: the number of the normal difference indicated using five bit binary datas
According to range, correspondingly, the first place of five bit binary data is sign bit.
4. a kind of pumping-unit workdone graphic data compression storage method as described in claim 1, it is characterised in that the acquisition
The precision of indicator card data is to be saved in at least latter position decimal of decimal point.
5. a kind of pumping-unit workdone graphic data compression storage method as described in claim 1, it is characterised in that described is preset
Value range includes:
What is be arranged includes the interval range of 90% above data in the difference data.
6. a kind of device for realizing pumping-unit workdone graphic compression storing data, it is characterised in that described device includes:
Data acquisition module obtains indicator card data, calculates the difference data for obtaining adjacent data in the indicator card data, will
The source point data of collected first load or displacement data as one group of indicator card data；
Normal difference module, for being arranged the preset value range of normal difference, and according to the preset value range from described
Normal difference data are chosen in difference data；
Special difference block, the special difference of data acquisition for removing the normal difference from the difference data；
Memory module, for storing source point data in the indicator card data；Successively store the number, special of the special difference
The position of difference and data value, comprising: first store the source point data, indicate the beginning data value of this group of indicator card data, so
After store the normal difference data and special difference data, in data storage procedure, the first character in storing data library
First storage source point data SD is saved, then successively stores number, position and the data value of special difference SDV, then step-by-step successively stores
The normal difference NDV, wherein the first place of each normal difference is sign bit, the step-by-step storage, including will show function
The binary data bit-by-bit position of the particular number of bits of figure normal difference data is stored；
It is also used to the data that step-by-step successively stores the normal difference.
7. a kind of device for realizing pumping-unit workdone graphic compression storing data as claimed in claim 6, it is characterised in that described
The preset value range for the normal difference being arranged in normal difference module includes:
The normal difference data indicated using the binary data of predetermined figure, the first place of the binary data of the predetermined figure
For sign bit.
8. a kind of device for realizing pumping-unit workdone graphic compression storing data as claimed in claim 7, it is characterised in that described
The normal difference data that the binary data of predetermined figure indicates include:
Using the data area for the normal difference that N bit binary data indicates, correspondingly, the first place of the N bit binary data
For sign bit.
9. a kind of device for realizing pumping-unit workdone graphic compression storing data as claimed in claim 6, which is characterized in that described
Indicator card data storage device further include:
Precision processing unit, the indicator card data processing for obtaining the data acquisition module are to meet pre-set number
According to required precision.
10. a kind of device for realizing pumping-unit workdone graphic compression storing data as claimed in claim 9, it is characterised in that described
The data precision requirement being located in advance is to be saved in at least latter position decimal of decimal point.
11. a kind of device for realizing pumping-unit workdone graphic compression storing data as claimed in claim 6, it is characterised in that described
The preset value range for the normal difference being arranged in normal difference module includes:
What is be arranged includes the interval range of 90% above data in the difference data.
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| CN104867166B (en) * | 2015-05-22 | 2018-04-06 | 北京师范大学 | A kind of oil well indicator card compression and storage method based on sparse dictionary study |
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| CN108981990B (en) * | 2018-07-25 | 2020-10-09 | 中国石油天然气股份有限公司 | Indicator |
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