CN111444581A - Equipment operation efficiency expression generation method and related equipment - Google Patents
Equipment operation efficiency expression generation method and related equipment Download PDFInfo
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- CN111444581A CN111444581A CN202010223022.XA CN202010223022A CN111444581A CN 111444581 A CN111444581 A CN 111444581A CN 202010223022 A CN202010223022 A CN 202010223022A CN 111444581 A CN111444581 A CN 111444581A
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Abstract
The embodiment of the application discloses a method for generating an equipment operation efficiency expression, which is used for analyzing the equipment operation efficiency. The method in the embodiment of the application comprises the following steps: a plurality of constituent units included in the apparatus are acquired. And acquiring the series-parallel relation among a plurality of composition units in the equipment. And obtaining the operation efficiency expressions of the plurality of the composition units. And calculating to obtain an operation efficiency expression of the equipment by using the operation efficiency expressions of the plurality of the composition units according to the series-parallel relation among the composition units.
Description
Technical Field
The embodiment of the application relates to the field of machinery, in particular to a method for generating an equipment operation efficiency expression and related equipment
Background
The equipment deterioration refers to the phenomenon that the running efficiency of the equipment is gradually reduced due to the abrasion, fatigue or deformation, corrosion and aging caused by the environment of parts in the using process of the equipment. There are inevitable degradation conditions during use of the device. The equipment deterioration reduces the operation efficiency of the equipment, and further, the energy consumption of production enterprises is gradually increased. In order to cope with the deterioration of the equipment, attention is paid to analysis of the variation of the deterioration of the equipment, that is, the operation efficiency.
The variation of the operation efficiency of the equipment is often related to a plurality of factors, such as the wear, fatigue or aging of parts, and can be generally summarized as the relation between the operation efficiency and the time or the relation between the operation efficiency and the accumulated load. If the operation efficiency of the equipment is gradually reduced to a certain value due to degradation, the influence on the equipment connected with the upper and lower stages can be generated, so that the problems of safety, energy consumption increase and the like are caused, and therefore, the method has important significance for accurately judging the change condition of the operation efficiency of the equipment and maintaining the related equipment in time.
Disclosure of Invention
A first aspect of the embodiments of the present application provides a method for generating an expression of operation efficiency of a device, where the method includes:
acquiring a plurality of constituent units included in equipment;
acquiring a series-parallel relation among a plurality of composition units in the equipment;
obtaining an operation efficiency expression of the plurality of composition units;
and calculating to obtain an operation efficiency expression of the equipment by using the operation efficiency expressions of the plurality of the composition units according to the series-parallel relation among the composition units.
Based on the method for generating the device operation efficiency expression provided in the first aspect of the embodiment of the present application, optionally:
the obtaining of the operation efficiency expression of the plurality of component units includes:
obtaining an operation efficiency model corresponding to the composition unit;
reading historical parameters of the equipment;
and acquiring an operation efficiency expression corresponding to the composition unit by using the operation efficiency model corresponding to the composition unit and the historical parameters.
Based on the method for generating the device operation efficiency expression provided in the first aspect of the embodiment of the present application, optionally:
the operational efficiency expression includes: an operational expression indicating a numerical relationship between the cumulative load and the operating efficiency, or an operational expression indicating a numerical relationship between the operating time and the operating efficiency.
Based on the method for generating the device operation efficiency expression provided in the first aspect of the embodiment of the present application, optionally: the operating efficiency in the operating efficiency expression has a lower limit value.
Based on the method for generating the device operation efficiency expression provided in the first aspect of the embodiment of the present application, optionally: the method further comprises the following steps:
and generating an operation efficiency change curve of the equipment by using the operation efficiency expression of the equipment.
Based on the method for generating the device operation efficiency expression provided in the first aspect of the embodiment of the present application, optionally: the method further comprises the following steps:
acquiring a recovery coefficient of the maintenance behavior to the operation efficiency, wherein the product of the recovery coefficient and the operation efficiency before maintenance is equal to the operation efficiency after maintenance, or the sum of the recovery coefficient and the operation efficiency before maintenance is equal to the operation efficiency after maintenance;
acquiring a maintenance plan, wherein the maintenance plan comprises different maintenance behaviors executed on the equipment and conditions for executing the maintenance behaviors;
and correcting the operating efficiency change curve by using the maintenance plan and the recovery coefficient of the maintenance behavior to the operating efficiency.
A second aspect of the embodiments of the present application provides an apparatus operation efficiency expression generating apparatus, including:
a composition acquisition unit configured to acquire a plurality of composition units included in the device;
the relation acquisition unit is used for acquiring the series-parallel relation among a plurality of composition units in the equipment;
a unit operation efficiency obtaining unit, configured to obtain operation efficiency expressions of the plurality of component units;
and the equipment operation efficiency generating unit is used for calculating the operation efficiency expression of the equipment by using the operation efficiency expressions of the plurality of the composition units according to the series-parallel relation among the composition units.
A third aspect of the embodiments of the present application provides an apparatus operation efficiency expression generating apparatus, including:
the system comprises a processor, a memory, a bus and input and output equipment;
the processor is connected with the memory and the input and output equipment;
the bus is respectively connected with the processor, the memory and the input and output equipment;
the processor is configured to execute the method according to any one of the methods for generating an expression of operation efficiency of a device provided in the first aspect of the embodiments of the present application.
A fourth aspect of the embodiments of the present application provides a computer-readable storage medium, including instructions, which when executed on a computer, cause the computer to perform the method according to any one of the methods for generating an expression of device operation efficiency provided in the first aspect of the embodiments of the present application.
A fifth aspect of the embodiments of the present application provides a computer program product containing instructions, which when run on a computer, causes the computer to execute the method according to any one of the methods for generating an expression of device operation efficiency provided in the first aspect of the embodiments of the present application.
According to the technical scheme, the embodiment of the application has the following advantages: the equipment is divided into different units, the operation efficiency expression of each unit is obtained, the operation efficiency expression of the equipment is obtained according to the series-parallel connection relation among the units in the actual equipment, the fine grain degree is high, and the obtained result is accurate.
Drawings
FIG. 1 is a schematic flow chart diagram illustrating an embodiment of a method for generating an operating efficiency expression of a device according to the present application;
FIG. 2 is another schematic flow chart diagram illustrating an embodiment of a method for generating an operational efficiency expression of a device according to the present application;
FIG. 3 is a schematic structural diagram of an embodiment of a device operation efficiency expression generation device according to the present application;
fig. 4 is another schematic structural diagram of an embodiment of the device operation efficiency expression generation device according to the present application.
Detailed Description
The embodiment of the application provides a method for generating an expression of equipment operation efficiency, which is used for judging the equipment operation efficiency and the degradation degree.
The equipment deterioration refers to the phenomenon that the running efficiency of the equipment is gradually reduced due to the abrasion, fatigue or deformation, corrosion and aging caused by the environment of parts in the using process of the equipment. There are inevitable degradation conditions during use of the device. The equipment deterioration reduces the operation efficiency of the equipment, and further, the energy consumption of production enterprises is gradually increased. In order to cope with the deterioration of the equipment, attention is paid to analysis of the variation of the deterioration of the equipment, that is, the operation efficiency.
The processing scheme required to be adopted is different for different equipment degradation conditions. Due to different actual structures, the operation efficiency change degrees of various devices are different, and often cannot be described by one kind of data or factor
The existing analysis of the operating efficiency of the plant is usually based on the reliability of the plant, and the limit value of safe operation is obtained based on the fatigue limit of some materials or components, while the systematicness has less specific functional relationship to the operating efficiency of the plant and the relevant parameters (time, accumulated load, etc.). The analysis on the operation efficiency of the equipment generally aims at the whole equipment, the granularity is coarse, and the obtained conclusion is relatively general. Meanwhile, when the difference caused by the overhaul and maintenance of the components influencing the operation efficiency of the equipment occurs, the analysis accuracy of the original operation efficiency is reduced.
Referring to fig. 1, an embodiment of a method for generating an operating efficiency expression of a device of the present application includes steps 101 to 104.
101. A plurality of constituent units included in the apparatus are acquired.
A plurality of constituent units included in the apparatus are acquired. The method includes the steps of dividing component parts of equipment needing operation efficiency analysis, wherein specific division rules can be divided according to functions of the component parts, for example, an engine can be divided into units such as a transmission unit, a combustion unit and a protection unit, or can be divided according to single component parts, for example, a bearing component is divided into a unit and a gear component is divided into a unit, and the bearing component and the gear component can be divided into units according to requirements in a specific implementation process, and the division is not limited herein.
102. And acquiring the series-parallel relation among a plurality of composition units in the equipment.
The method comprises the steps of obtaining a series-parallel relation among a plurality of composition units in the equipment, obtaining the relation among the divided composition units, wherein the relation is abstracted into a series relation and a parallel relation, and if two composition units in the equipment are connected in sequence in the working process, such as a stator component and a rotor component in an engine, if the stator component and the rotor component are divided into two different composition units, the relation between the stator component and the rotor component in the working process is a series relation. The parallel connection relationship means that in the working process of the equipment, a plurality of constituent units together complete a task, and the relationship of the two constituent units is regarded as parallel connection. For example, for a tire component on an automobile, a plurality of tires jointly fulfill the task of providing friction force to ground friction to drive the automobile, and when the tires are divided into different constituent units, the constituent units of the tires are in parallel connection.
103. And obtaining the operation efficiency expressions of the plurality of the composition units.
And obtaining the operation efficiency expressions of the plurality of the composition units. Analyzing the divided component units to obtain the operation efficiency expression of the component units, wherein the operation efficiency expression is the relational expression of the operation efficiency of the component units and time and/or accumulated load, the relation of the operation efficiency of the component units and the time and/or accumulated load can be obtained according to the single body properties of the component, such as fatigue strength, rigidity, hardness and the like, for the condition that the component units contain single components, and the component units can be specifically analyzed for the condition of functional division.
104. And calculating to obtain an operation efficiency expression of the equipment by using the operation efficiency expressions of the plurality of the composition units according to the series-parallel relation among the composition units.
And calculating to obtain an operation efficiency expression of the equipment by using the operation efficiency expressions of the plurality of the composition units according to the series-parallel relation among the composition units. After the operation efficiency expressions of the constituent units are obtained, the operation efficiency expressions of the equipment can be obtained according to the series-parallel relation among the constituent units, wherein the expressions are in a multiplication relation under the series condition, and the expressions are in an average relation under the parallel condition.
According to the technical scheme, the embodiment of the application has the following advantages: the equipment is divided into different units, the operation efficiency expression of each unit is obtained, the operation efficiency expression of the equipment is obtained according to the series-parallel connection relation among the units in the actual equipment, the fine grain degree is high, and the obtained result is accurate.
Referring to fig. 2, an embodiment of a method for generating an operating efficiency expression of a device of the present application includes steps 201 to 210.
201. A plurality of constituent units included in the apparatus are acquired.
A plurality of constituent units included in the apparatus are acquired. The components of the device that needs to perform the operation efficiency analysis are divided, and this step is similar to step 101 in the embodiment corresponding to fig. 1, and is not described here again.
202. And acquiring the series-parallel relation among a plurality of composition units in the equipment.
Obtaining a serial-parallel relationship between a plurality of constituent units in the device, and obtaining a relationship between the divided constituent units, which is abstracted as a serial relationship and a parallel relationship, and this step is similar to step 102 in the corresponding embodiment of fig. 1, and is not described here again.
203. And acquiring an operation efficiency model corresponding to the composition unit.
Obtaining operation efficiency models corresponding to the composition units, wherein the operation efficiency models comprise an operation efficiency model taking accumulated load as an independent variable and taking operation efficiency as a dependent variable and an operation efficiency model taking operation time as an independent variable and taking operation efficiency as a dependent variable, different operation efficiency models are selected according to the operation conditions of each unit, and the operation efficiency models comprise independent variables: cumulative load or run time, dependent variable: the operation efficiency also comprises a plurality of constants which are determined according to the properties of the composition units.
204. Reading historical parameters of the device.
Reading historical parameters of the device. The historical parameters of the equipment comprise design parameters, running time, accumulated load and other data of the equipment, and particularly energy consumption data of the relevant equipment in a real-time database is needed. The energy consumption data of the relevant equipment in the real-time database can be used for analyzing the current equipment operation efficiency of the equipment, and the current equipment state is used as a calculation basis for the equipment operation efficiency under other conditions in the future.
205. And acquiring an operation efficiency expression corresponding to the composition unit by using the operation efficiency model corresponding to the composition unit and the historical parameters.
And acquiring an operation efficiency expression corresponding to the composition unit by using the operation efficiency model corresponding to the composition unit and the historical parameters. And (3) processing the operation efficiency model corresponding to each component unit by using the equipment historical parameters obtained in the step (204), bringing the equipment historical parameters of different loads at different moments into the operation efficiency model corresponding to each component unit, solving the operation efficiency models, and generating the operation efficiency model of the component unit based on the characteristic expression and the historical data by using a statistical method or a machine learning method and the like. Constant values contained in the operating efficiency model for the different units in the plant are derived. And obtaining the determined operation efficiency model. It should be noted that for a component unit, the corresponding operation efficiency model should have a set lower limit value, and the operation efficiency model followed by the operation efficiency reduction process of the equipment may represent the reduction process within a certain range, and when the operation efficiency of the equipment is reduced to a certain degree, the operation efficiency of the equipment may be drastically changed, and there may be a case where the operation efficiency model is not complied with. The lower limit may be set according to manual experience or other indicators of the equipment, and is not limited herein.
206. And calculating to obtain an operation efficiency expression of the equipment by using the operation efficiency expressions of the plurality of the composition units according to the series-parallel relation among the composition units.
And calculating to obtain an operation efficiency expression of the equipment by using the operation efficiency expressions of the plurality of the composition units according to the series-parallel relation among the composition units. After the operation efficiency expressions of the constituent units are obtained, the operation efficiency expression of the equipment can be obtained according to the series-parallel relation among the constituent units, the operation rule follows the calculation rule of the series-parallel relation of the circuits, the expressions in the series condition are in multiplication relation, the expressions in the parallel condition are in average relation, the expressions in the parallel condition are calculated sequentially from the most basic constituent units to the upper level, and finally the operation efficiency model of the equipment is obtained.
207. And generating an operation efficiency change curve of the equipment by using the operation efficiency expression of the equipment.
And generating an operation efficiency change curve of the equipment by using the operation efficiency expression of the equipment. After the operation efficiency expression of the equipment is obtained, values such as the operation time and the accumulated load can be input, the operation efficiency of the equipment under the set working condition is obtained, and different values such as the operation time and the accumulated load are input, so that an operation efficiency change curve generated by the equipment according to the change of the values such as the operation time and the accumulated load can be obtained.
208. And acquiring the recovery coefficient of the maintenance behavior to the operation efficiency.
And acquiring the recovery coefficient of the maintenance behavior to the operation efficiency. Under the condition of an operating efficiency change curve corresponding to the existing equipment, the operating efficiency is gradually reduced along with the accumulation of historical total load in the operating process of increasing the operating time, when the operating efficiency is reduced to a certain degree, the equipment is probably close to the fatigue limit, the abrasion condition of the equipment is probably changed from normal abrasion into rapid abrasion, and the safety hazards such as unstable equipment operation are brought, so that the equipment is required to be overhauled when the operating efficiency is reduced to a certain value, the operating efficiency of the equipment can be restored to a certain degree by the overhauling action of the equipment, and the ratio or the difference between the operating efficiency of the equipment and the operating efficiency of the equipment between the overhauling and the overhauling after the overhauling is finished is called the recovery coefficient of the overhauling action on the operating efficiency. Different recovery coefficients corresponding to different types of overhaul behaviors exist, and the recovery coefficients generated by the different overhaul behaviors are specifically determined according to the overhaul behavior types, the equipment states, whether component replacement behaviors exist or not and the like. Meanwhile, the overhaul behavior can be carried out only for a certain constituent unit, and a recovery coefficient is generated for the unit, and the calculation mode of the recovery coefficient of the unit is the same as that of the recovery coefficient of the equipment.
It is noted that the implementation of step 208 is not causal to the other steps described above, and may be performed at any point in time and is not limiting with respect to the other steps. In the present embodiment, step 208 is described after step 201 to step 207 for convenience of description, and the implementation timing of this step is not limited.
209. And acquiring a maintenance plan.
A service plan is obtained, the service plan including different service activities performed on different units and conditions under which the service activities are performed. The maintenance activities included in the maintenance schedule week, particularly the corresponding recovery coefficients, can be used to calculate the operation efficiency of the equipment before and after maintenance, and the maintenance schedule is generally overlapped with the production schedule corresponding to the equipment. The condition for implementing the overhaul behavior is generally that the overhaul behavior is implemented on a determined date, or the overhaul behavior is triggered when the equipment operation efficiency reaches a certain value, or the overhaul behavior is implemented when the accumulated total load reaches a certain value
It is to be understood that the maintenance schedule may not be a separately determined schedule, and a plurality of maintenance schedules may be obtained and the most suitable maintenance schedule may be obtained by selecting the optimal schedule a plurality of times, and the maintenance schedule may be implemented according to the preferred maintenance schedule.
It is noted that the implementation of step 209 is not causal to the other steps described above, and may be performed at any point in time and is not limiting to the other steps. This embodiment is described after being placed in steps 201 to 208 for convenience of description, and does not limit the implementation timing of this step.
210. And correcting the operating efficiency change curve by using the maintenance plan and the recovery coefficient of the maintenance behavior to the operating efficiency.
And correcting the operating efficiency change curve by using the maintenance plan and the recovery coefficient of the maintenance behavior to the operating efficiency. After obtaining the determined operating efficiency change curve, the change of the independent variable accumulated load or the operating time is determined, and the operating efficiency change curve is corrected by using the maintenance plan, the maintenance behavior included in the maintenance plan and the recovery coefficient of the maintenance behavior on the operating efficiency, so as to obtain the operating efficiency change curve considering the maintenance factors under the condition of determining the change process of the accumulated load and/or the operating time. The corrected operating efficiency curve obtained at this time may be comprehensively influenced by the cumulative load and/or the operating time and the maintenance schedule. And the corrected load curve can be adjusted manually after being obtained, and the method is not limited here.
Referring to fig. 3, the device operation efficiency expression generating device of the present application includes: a composition acquisition unit 301, a relationship acquisition unit 302, a unit operation efficiency acquisition unit 303, and an apparatus operation efficiency generation unit 304, wherein:
a composition acquisition unit 301 configured to acquire a plurality of composition units included in the apparatus.
A relationship obtaining unit 302, configured to obtain a series-parallel relationship between multiple constituent units in the device.
A unit operation efficiency obtaining unit 303, configured to obtain operation efficiency expressions of the multiple constituent units.
And the equipment operation efficiency generating unit 304 is configured to calculate, according to the series-parallel relationship among the constituent units, an operation efficiency expression of the equipment by using the operation efficiency expressions of the constituent units.
The flow executed by the obtaining unit, the relationship obtaining unit, the unit operation efficiency obtaining unit, and the device operation efficiency generating unit in this embodiment is similar to the flow of the embodiment corresponding to fig. 1, and is not described here again.
Fig. 4 is a schematic structural diagram of a device operation efficiency expression generating device according to an embodiment of the present application, where the server 400 may include one or more Central Processing Units (CPUs) 401 and a memory 405, where the memory 405 stores one or more application programs or data.
In this embodiment, the specific functional module division in the central processing unit 401 may be similar to the functional module division manner of the units such as the composition obtaining unit, the relationship obtaining unit, the unit operation efficiency obtaining unit, and the device operation efficiency generating unit described in fig. 3, and is not described herein again.
The server 400 may also include one or more power supplies 402, one or more wired or wireless network interfaces 403, one or more input-output interfaces 404, and/or one or more operating systems, such as Windows Server, MacOSXTM, UnixTM, and L TtT translation = & &gTt L &lTt/T &gTtinxTM, FreeBSDTM, etc.
The central processing unit 401 may execute the operations executed by the device operation efficiency expression generating method in the embodiment shown in fig. 1 or fig. 2, which are not described herein again in detail.
An embodiment of the present application further provides a computer storage medium, where the computer storage medium is used to store computer software instructions for the device operation efficiency expression generation device, and includes a program for executing a method designed for generating the device operation efficiency expression.
The device operation efficiency expression generation device may be the device operation efficiency expression generation device described in the foregoing fig. 3.
An embodiment of the present application further provides a computer program product, where the computer program product includes computer software instructions, and the computer software instructions may be loaded by a processor to implement the flow of the method for generating an expression of operation efficiency of a device in any one of fig. 1 and fig. 2.
It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
In the several embodiments provided in the present application, it should be understood that the disclosed system, apparatus and method may be implemented in other manners. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.
The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present application may be substantially implemented or contributed to by the prior art, or all or part of the technical solution may be embodied in a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a read-only memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and various media capable of storing program codes.
Claims (10)
1. An apparatus operation efficiency expression generation method is characterized by comprising:
acquiring a plurality of constituent units included in equipment;
acquiring a series-parallel relation among a plurality of composition units in the equipment;
obtaining an operation efficiency expression of the plurality of composition units;
and calculating to obtain an operation efficiency expression of the equipment by using the operation efficiency expressions of the plurality of the composition units according to the series-parallel relation among the composition units.
2. The device operation efficiency expression generation method according to claim 1, characterized in that:
the obtaining of the operation efficiency expression of the plurality of component units includes:
obtaining an operation efficiency model corresponding to the composition unit;
reading historical parameters of the equipment;
and acquiring an operation efficiency expression corresponding to the composition unit by using the operation efficiency model corresponding to the composition unit and the historical parameters.
3. The device operation efficiency expression generation method according to claim 1, characterized in that:
the operational efficiency expression includes: an operational expression indicating a numerical relationship between the cumulative load and the operating efficiency, or an operational expression indicating a numerical relationship between the operating time and the operating efficiency.
4. The device operation efficiency expression generation method according to claim 1, characterized in that: the operating efficiency in the operating efficiency expression has a lower limit value.
5. The device operation efficiency expression generation method according to claim 1, further comprising:
and generating an operation efficiency change curve of the equipment by using the operation efficiency expression of the equipment.
6. The device operation efficiency expression generation method according to claim 5, characterized in that: the method further comprises the following steps:
acquiring a recovery coefficient of the maintenance behavior to the operation efficiency, wherein the product of the recovery coefficient and the operation efficiency before maintenance is equal to the operation efficiency after maintenance, or the sum of the recovery coefficient and the operation efficiency before maintenance is equal to the operation efficiency after maintenance;
acquiring a maintenance plan, wherein the maintenance plan comprises different maintenance behaviors executed on the equipment and conditions for executing the maintenance behaviors;
and correcting the operating efficiency change curve by using the maintenance plan and the recovery coefficient of the maintenance behavior to the operating efficiency.
7. An apparatus operation efficiency expression generation apparatus, comprising:
a composition acquisition unit configured to acquire a plurality of composition units included in the device;
the relation acquisition unit is used for acquiring the series-parallel relation among a plurality of composition units in the equipment;
a unit operation efficiency obtaining unit, configured to obtain operation efficiency expressions of the plurality of component units;
and the equipment operation efficiency generating unit is used for calculating the operation efficiency expression of the equipment by using the operation efficiency expressions of the plurality of the composition units according to the series-parallel relation among the composition units.
8. An apparatus operation efficiency expression generation apparatus, comprising:
the system comprises a processor, a memory, a bus and input and output equipment;
the processor is connected with the memory and the input and output equipment;
the bus is respectively connected with the processor, the memory and the input and output equipment;
the processor is configured to perform the method of any one of claims 1 to 6.
9. A computer-readable storage medium comprising instructions that, when executed on a computer, cause the computer to perform the method of any of claims 1 to 6.
10. A computer program product comprising instructions which, when run on a computer, cause the computer to perform the method of any one of claims 1 to 6.
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| US20150363466A1 (en) * | 2014-06-11 | 2015-12-17 | International Business Machines Corporation | Dynamic query optimization with pilot runs |
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