CN115050187B - Public opinion knowledge graph-based digital urban traffic management method - Google Patents
Public opinion knowledge graph-based digital urban traffic management method Download PDFInfo
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- G—PHYSICS
- G08—SIGNALLING
- G08G—TRAFFIC CONTROL SYSTEMS
- G08G1/00—Traffic control systems for road vehicles
- G08G1/01—Detecting movement of traffic to be counted or controlled
- G08G1/0104—Measuring and analyzing of parameters relative to traffic conditions
- G08G1/0125—Traffic data processing
- G08G1/0129—Traffic data processing for creating historical data or processing based on historical data
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- G—PHYSICS
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- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F16/00—Information retrieval; Database structures therefor; File system structures therefor
- G06F16/30—Information retrieval; Database structures therefor; File system structures therefor of unstructured textual data
- G06F16/36—Creation of semantic tools, e.g. ontology or thesauri
- G06F16/367—Ontology
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- G—PHYSICS
- G08—SIGNALLING
- G08G—TRAFFIC CONTROL SYSTEMS
- G08G1/00—Traffic control systems for road vehicles
- G08G1/01—Detecting movement of traffic to be counted or controlled
- G08G1/0104—Measuring and analyzing of parameters relative to traffic conditions
Abstract
The invention discloses a public opinion knowledge graph-based digital urban traffic control method. In order to overcome the defects that the prior art only manages and controls urban traffic in a short time and lacks long-time urban traffic planning and management. The invention comprises the following steps: s1: obtaining multi-dimensional historical public transport opinion information of different cities, and constructing a public transport opinion knowledge map; s2: dividing a city into a plurality of control areas, collecting public traffic opinion data of each control area in real time, and identifying and processing categories; s3: when the processing category is real-time management and control, determining the specific position and specific event of the abnormality according to the public traffic opinion data, and associating and executing corresponding traffic management and control operation; s4: and when the processing category is long-term planning, determining a specific event according to the public traffic opinion data, matching a planning processing scheme and feeding back. The urban traffic is managed and controlled in real time and suggested for long-term planning based on the knowledge map, collected public sentiment information is fully utilized, and the urban traffic management level is improved.
Description
Technical Field
The invention relates to the field of urban management, in particular to a public opinion knowledge graph-based digital urban traffic management method.
Background
With the accelerated transformation of economic society, the rapid population increase, resource shortage and ecological environment deterioration become serious problems in the process of urbanization, and the sustainable development of large and medium cities becomes one of the key points of attention of human society. The construction of the digital city becomes a brand new city development concept and practice path.
The knowledge graph is an effective means for processing big data of a digital city. Along with the continuous development of novel digital city construction, the demand of people on data application is continuously improved, the data generated by citizen life and operation of various industries is explosively increased, data sources cover the internet, city-level internet of things, social networks, enterprise data operator data, space-time data and the like, a city-level big data center is formed, and reasonable allocation of resources is realized by using big data technologies such as intelligent perception, distributed storage, data mining, real-time dynamic visualization and the like.
Urban traffic as an indispensable link to "digital cities", there are various kinds of information-based traffic management systems, such as: checking traffic management information based on geographic information, including checking police force (personnel, vehicles and equipment) online and distribution conditions; analyzing traffic data based on geographic information, wherein the analysis comprises road traffic flow statistics, average speed of each road section, traffic flow density, congestion degree analysis and display and the like; the two-dimensional map is linked with video monitoring, intelligent analysis of videos is combined, vehicle illegal behavior recognition, positioning, monitoring and checking are carried out, and the map and the videos are linked through manual switching operation; and distributing an authority type index interface, and distributing visual interfaces to traffic managers in different levels according to the authority. The general information traffic management system only has feedback processing on the current or real-time traffic condition, and lacks the development planning management on the long-term urban traffic.
For example, a "traffic operation management system based on traffic management knowledge graph" disclosed in chinese patent literature, which is published under the number CN110442731A, the system establishment includes the following steps; s1, the system constructs a plurality of core service display board modules based on an index model system, and each core service display board module is provided with index parameters; s2: establishing a uniform business data description standard model by a traffic management KPI index system model library; s3: the system rapidly positions the positions of the service operation signs or abnormal signs and related conditions according to the traffic management service index knowledge graph; s4: the system establishes a management cockpit module based on a traffic management knowledge graph; s5: and establishing a physical sign thematic module, indexes and desktop thematic configuration.
The scheme has control on the current urban traffic in a short time, but lacks planning and management on the urban traffic for a long time.
Disclosure of Invention
The invention mainly solves the problem that the prior art is lack of long-term planning and control of urban traffic according to acquired information; the method is characterized in that according to information such as traffic public sentiment collected in real time, urban traffic is managed and controlled in real time and suggested for long-term planning based on the knowledge map, the collected information is fully utilized, and the urban traffic management level is improved.
The technical problem of the invention is mainly solved by the following technical scheme:
a public opinion knowledge graph-based digital urban traffic management method comprises the following steps:
s1: obtaining multi-dimensional historical public transport opinion information of different cities, and constructing a public transport opinion knowledge map;
s2: dividing a city into a plurality of control areas, collecting public transport opinion data of each control area in real time, and identifying the processing category of the collected public transport opinion data as real-time control, no processing or long-term planning according to a public transport opinion knowledge map;
s3: when the processing category is real-time management and control, determining the specific position and specific event of the abnormality according to the public traffic opinion data, and associating and executing corresponding traffic management and control operation;
s4: and when the processing category is long-term planning, determining a specific event according to the public traffic opinion data, matching a planning processing scheme and feeding back.
The public transport opinion management method based on the knowledge map is used for constructing the public transport opinion map based on historical public transport opinion data, carrying out real-time management and control and long-term planning suggestion on urban traffic based on the knowledge map through real-time collected public transport opinion information, fully utilizing the collected information and improving the urban traffic management level. Public opinion information is fully utilized, and guidance and suggestions are provided for the management of urban traffic.
Preferably, the dimension of the traffic history public opinion information comprises a place, a time, an object, an event keyword, a property and an influence. Public opinion information is extracted from multiple dimensions, namely the public opinion information can be used for constructing a public opinion knowledge graph and can be conveniently subjected to subsequent targeted processing on the public opinion information. And mutual verification is facilitated.
Preferably, the step S2 includes the steps of:
s201: dividing each city into a plurality of control areas according to the location distribution of historical traffic public opinion information;
s202: collecting public traffic opinion data and traffic live data by each control area at a set sampling frequency;
s203: and judging the processing type of the public transport opinion data based on the public transport opinion knowledge graph according to the acquired public transport opinion data, and verifying the public transport opinion data by combining with the traffic live data.
The public transport opinion data in different areas are collected and processed in a partitioning mode, and the efficiency and accuracy of information processing are improved.
Preferably, the process of dividing the control area includes:
based on the city map, expressing all public traffic opinion information on the city map in a marking mode according to the minimum location position in the location dimension; the size of the mark is a traffic influence range in influence dimensionality in the public transport opinion information;
determining path nodes after traversing all public transport opinion information; selecting a least marked coverage area on the urban map, clustering the coverage area, and determining a plurality of path nodes;
and sequentially selecting node paths between the nodes of each adjacent path by taking the minimum mark coverage range between the nodes of the adjacent paths as a path range and taking the shortest distance in the path range as a node path to form a closed control area.
And different areas are divided, and grid management is performed, so that the efficiency of urban traffic management is improved.
Preferably, each control area collects traffic public opinion data at a set public opinion sampling frequency, and adjusts the live collecting frequency according to the collected and fed back traffic live data:
wherein the content of the first and second substances,
a live acquisition frequency for an ith time period;
[ ] is the rounding calculation;
wherein, the first and the second end of the pipe are connected with each other,
a set maximum live acquisition frequency;
According to the speed difference between the vehicle speed and the set vehicle speed, the common problem of urban traffic can be reflected, such as congestion at the peak of the morning and evening, influence of severe weather on driving, road maintenance and the like; the larger the speed difference is, the more serious the above problem is, and the acquisition frequency needs to be increased so as not to miss important information. Whether accidents happen to the current lane or not can be reflected according to the adjacent vehicle speed difference, if the adjacent vehicle speed difference is larger, the possibility that accidents happen to the current lane is higher, and the collection frequency needs to be increased so as to avoid missing important information. The real-time traffic condition is used for adjusting the live acquisition frequency of different areas, so that important traffic information is not missed, excessive useless information is not generated, and resource waste is avoided.
Preferably, each control area collects traffic live data at a set live collection frequency, and public opinion sampling frequency is adjusted according to the live collection frequency:
wherein the content of the first and second substances,
public opinion collection frequency in the ith time period;
wherein the content of the first and second substances,
the method comprises the steps of setting maximum public opinion collection frequency;
The public opinion collecting frequency is increased according to real-time road conditions, the public opinion collection is combined with real-time road conditions, the public opinion collecting efficiency is improved, and important public transport opinions are not missed.
Preferably, the collected public transportation opinion data comprises official public opinion data and non-official public opinion data. Official data and unofficial data have different public credibility and are used as an index for judging the truth of public sentiments.
Preferably, clustering the collected public traffic opinion data according to dimensions to form public opinion data clusters on the dimensions;
taking a cluster from each dimension, and performing intersection to obtain a group of same public transport opinion data sets;
traversing all clusters, and obtaining a plurality of same public transport opinion data sets after arrangement and combination;
and respectively matching the public transport opinion data in the same public transport opinion data set with the public transport opinion knowledge map to obtain corresponding processing categories.
And clustering different reports of the same event, and mutually checking the matching result of the knowledge graph.
Preferably, historical public opinion data matched through the public opinion knowledge graph and collected live traffic data are checked, whether the historical public opinion data and the collected live traffic data are the same event or not is judged, if yes, a corresponding matching result is executed, and if not, the historical public opinion data and the collected live traffic data are fed back and then matched through the public opinion knowledge graph again;
if the processing types of the public transport opinion data matching in the same public transport opinion data set are different, taking the matching result of official public opinion data as a final result;
if there is no public opinion data, the final result is the result of most processing categories.
And the reliability of the matching result is improved.
Preferably, a historical planning scheme is matched based on a public opinion knowledge graph through event keywords in the public opinion data;
judging whether the planning scheme exists in a traffic construction planning list of the city, and if so, reordering the importance of the planning scheme in the traffic construction planning list; otherwise, the planning scheme is fed back to the corresponding personnel for planning suggestion.
Preferably, the calculation process of the importance of the planning scheme is as follows:
wherein the content of the first and second substances,
importance of the kth planning scenario;
And calculating the importance of the planning through multiple dimensions, and providing a reference suggestion for the construction planning of urban traffic.
Preferably, when the collected public transport opinion data lack partial dimension information, data restoration is carried out; if the missing dimension is time, directly ending; and if the missing dimension is an event keyword, rejecting the public transport opinion data.
Preferably, the data recovery process is as follows:
a1: matching the public transport opinion data lacking partial dimensionality with the public opinion knowledge map, judging whether corresponding processing categories can be obtained, if so, ending, otherwise, entering the step A2;
a2: and respectively arranging and combining the clusters on other dimensions to form an intersection to obtain a plurality of public opinion data sets.
A3: judging whether other public transport opinion data exist in a public opinion data set where public transport opinion data lacking dimensionality is located; if yes, entering the step A4, otherwise, entering the step A5;
a4: judging whether other complete public transport opinion data are identical in data of missing dimension, if so, repairing the data as the data of the missing dimension, otherwise, entering the step A4;
a5: and traversing the historical public transport opinion information, matching, and selecting the historical public transport opinion information with the highest similarity as a repairing object for repairing the data of the corresponding dimensionality.
The beneficial effects of the invention are:
1. the public transport opinion management method based on the knowledge map is used for constructing the public opinion knowledge map based on historical public transport opinion data, carrying out real-time management and control and long-term planning suggestion on urban transport through the real-time collected public transport opinion information based on the knowledge map, fully utilizing the collected information and improving the urban transport management level.
2. Public sentiment information is fully utilized, and guidance and suggestions are provided for the management of urban traffic.
3. The public transport opinion data in different areas are collected and processed in a partitioned mode, and the efficiency and the accuracy of information processing are improved.
4. The general problem of urban traffic can be reflected according to the speed difference between the vehicle speed and the set vehicle speed, and the reasons of whether the current lane has accidents or not can be reflected according to the adjacent vehicle speed difference. The real-time traffic condition is used for adjusting the live acquisition frequency of different areas, so that important traffic information can be prevented from being missed, excessive useless information can be prevented from being generated, and resource waste is avoided.
5. The public opinion collecting frequency is increased according to real-time road conditions, the public opinion collection is combined with real-time road conditions, the public opinion collecting efficiency is improved, and important public transport opinions are not missed.
Drawings
Fig. 1 is a flow chart of an urban traffic control method of the invention.
Fig. 2 is a schematic view of a public transportation opinion knowledge graph according to the present invention.
Fig. 3 is a schematic diagram of the management area division according to the present invention.
Detailed Description
The technical scheme of the invention is further specifically described by the following embodiments and the accompanying drawings.
The embodiment is as follows:
the public opinion knowledge graph-based digital urban traffic control method of the embodiment, as shown in fig. 1, comprises the following steps:
s1: obtaining multi-dimensional historical public transport opinion information of different cities, and constructing a public transport opinion knowledge map.
One feature in historical public transport opinion information is used as a dimension, and the historical public transport opinion information comprises features such as places, time, objects, event keywords, properties, influence and the like.
The place comprises a public transport opinion information publishing place and an event correlation place; and characteristic vocabularies such as city names, street names, addresses, landmark buildings and the like are used as screening dimensions. And dividing the set of the public transport opinion information by taking the city name as a unit according to the subordinate relation of the place name associated with the event.
The time dimension comprises public transport opinion information publishing time and event correlation time mentioned in the public transport opinion information.
The object dimension is the subject of the event occurrence, including private cars, public transportation, roads, individuals, and the like.
The event keywords are selected event vocabularies related to traffic, such as car accidents, rear-end collisions, congestion, typhoons, heavy snow, heavy rain and the like.
The nature is the emotional attitude of people to each public transport opinion information, including positive, not concerned about and negative.
The influence is the range of spreading public transport opinion information and the traffic influence range caused by events.
And mutually associating the dimension information in the same historical public transportation opinion information, and associating and mapping the events in the historical public transportation opinion information with the corresponding traffic control decision.
The public transportation opinion knowledge graph shown in fig. 2 is constructed based on historical public transportation opinion information and traffic control decision, and the specific process of constructing the knowledge graph is not repeated in this embodiment.
S2: the method comprises the steps of dividing a city into a plurality of control areas, collecting public transport opinion data of each control area in real time, and identifying the processing category of the collected public transport opinion data as real-time control, no processing or long-term planning according to a public transport opinion knowledge map.
S201: and dividing each city into a plurality of control areas according to the location distribution of historical traffic public opinion information.
In the embodiment, as shown in fig. 3, on the basis of a city map, each piece of public transportation information is represented on the city map in a mark form according to the smallest location position in the location dimension. The size of the mark is the traffic influence range in the influence dimension in the public transport opinion information.
And determining path nodes after traversing all public transport opinion information. And selecting the coverage area of the least marks on the city map, clustering the coverage area, and determining a plurality of path nodes. In this embodiment, a K-means clustering algorithm is used to cluster the coverage area.
And sequentially selecting node paths between the nodes of each adjacent path by taking the minimum mark coverage range between the nodes of the adjacent paths as a path range and taking the shortest distance in the path range as a node path to form a closed control area.
S202: and each control area respectively collects public traffic sentiment data and live traffic data at a set sampling frequency.
And each control area respectively collects the public traffic sentiment data at a set public sentiment sampling frequency and collects the live traffic data at a set live collecting frequency.
Adjusting the live acquisition frequency according to the traffic live data acquired and fed back:
wherein the content of the first and second substances,
the live acquisition frequency for the ith time period.
And [. Cndot. ] is a rounding calculation.
Wherein the content of the first and second substances,
is the set maximum live acquisition frequency.
According to the speed difference between the vehicle speed and the set vehicle speed, the common problem of urban traffic can be reflected, such as congestion at the peak of the morning and evening, influence of severe weather on driving, road maintenance and the like; the larger the speed difference is, the more serious the above problem is, and the acquisition frequency needs to be increased so as not to miss important information.
Whether accidents happen to the current lane or not can be reflected according to the adjacent vehicle speed difference, if the adjacent vehicle speed difference is larger, the possibility that accidents happen to the current lane is higher, and the collection frequency needs to be increased so as to avoid missing important information.
The real-time traffic condition is used for adjusting the live acquisition frequency of different areas, so that important traffic information is not missed, excessive useless information is not generated, and resource waste is avoided.
Adjusting public opinion sampling frequency according to live acquisition frequency:
wherein the content of the first and second substances,
the public opinion collection frequency in the ith time period.
Wherein the content of the first and second substances,
the set maximum public sentiment collection frequency is obtained.
The public opinion collecting frequency is increased according to real-time road conditions, the public opinion collection is combined with real-time road conditions, the public opinion collecting efficiency is improved, and important public transport opinions are not missed.
S203: and judging the processing type of the public transport opinion data based on the public transport opinion knowledge graph according to the acquired public transport opinion data, and verifying the public transport opinion data by combining with the traffic live data.
The collected public transport opinion data comprises official public opinion data and non-official public opinion data.
And clustering the collected public transport opinion data according to the dimensions to form public opinion data clusters on the dimensions.
Taking a cluster from each dimension, and performing intersection to obtain a group of same public transport opinion data sets; and traversing all the clusters, and obtaining a plurality of identical public transport opinion data sets after arrangement and combination. In the embodiment, the same public transportation opinion data set is the same public transportation event opinion published on different platforms according to law.
For example, the collected public transportation opinion data A1, A2, A3, B, C1, C2, D1, D2, D3, D4, etc.;
if A1, A2 and A3 are a group of the same public transport opinion data sets; c1 and C2 are a group of same public transport opinion data sets; d1, D2, D3 and D4 are a group of same public transport opinion data sets;
then, the traffic public opinion data cluster of the place dimension { A1A 2A 3G H }, { C1C 2E R }, { D1D 2D 3D 4G K }, \8230; \ 8230
The method comprises the steps of clustering traffic public opinion data in a time dimension { A1A 2A 3E H }, { C1C 2B R }, { D1D 2D 3D 4G H }, \ 8230 \ 8230
The method comprises the following steps of clustering traffic public opinion data of object dimensions { A1A 2A 3H C1}, { C1C 2A 1A 2R }, { D1D 2D 3D 4B K }, \8230; \\ 8230
The method comprises the steps of clustering traffic public opinion data of event keyword dimensions { A1A 2A 3A 4D 1}, { C1C 2A 2R }, { D1D 2D 3D 4C 3H }, \ 8230 \ 8230
The method comprises the following steps of property and dimension traffic public opinion data clustering { A1A 2A 3E K }, { C1C 2C 3R }, { D1D 2D 3D 4H V }, \ 8230 \ 8230
The method comprises the steps of (1) clustering public transport opinion data of influence dimensionality { A1A 2A 3 RE }, { C1C 2J K }, { D1D 2D 3D 4A 1C 2}, \ 8230 \\ 8230
And sequentially intersecting to obtain the same public traffic opinion data set.
And respectively matching the public transport opinion data in the same public transport opinion data set with the public transport opinion knowledge map to obtain corresponding processing categories.
The treatment categories include real-time administration, no treatment required, or long-term planning.
And checking the historical public opinion data matched by the public opinion knowledge graph and the acquired live traffic data, judging whether the historical public opinion data and the acquired live traffic data are the same event, if so, executing a corresponding matching result, and otherwise, re-matching by the public opinion knowledge graph after feedback.
In the embodiment, for example, for the conditions related to traffic accidents, unexpected conditions, and the like, the real-time management and control categories are matched; for public transport opinions caused by inelegant force factors such as severe weather, the classes are matched without processing; and for public traffic opinions such as morning and evening peak congestion, long-term planning is matched.
And if the processing types of the public transport opinion data matching in the same public transport opinion data set are different, taking the matching result of the official public opinion data as a final result.
If there is no official public opinion data, the result of most processing categories is used as the final result.
When the collected public transport opinion data lack partial dimension information, data restoration is carried out. If the missing dimension is time, the method is finished directly. And if the missing dimension is the event keyword, rejecting the public transport opinion data.
A1: and matching the public traffic opinion data lacking partial dimensionality with the public opinion knowledge map, judging whether a corresponding processing category can be obtained, if so, ending, otherwise, entering the step A2.
A2: and respectively arranging and combining the clusters on other dimensions to form an intersection to obtain a plurality of public opinion data sets.
A3: judging whether other public transportation opinion data exist in a public opinion data set where the public transportation opinion data lacking dimensionality is located; if yes, go to step A4, otherwise, go to step A5.
A4: and judging whether the other complete public transport opinion data are identical in the missing dimension, if so, repairing the data serving as the missing dimension data, and otherwise, entering the step A4.
A5: and traversing the historical public transport opinion information, matching, and selecting the historical public transport opinion information with the highest similarity as a repairing object for repairing the data of the corresponding dimensionality.
S3: and when the processing category is real-time management and control, determining the specific position and specific event of the abnormality according to the public traffic opinion data, and associating and executing corresponding traffic management and control operation.
Historical traffic control means are matched based on the public opinion knowledge graph through event keywords in the traffic public opinion data, and the traffic control means comprises but is not limited to road closure, traffic control, temporary traffic light setting and the like.
And taking the most specific place as an abnormal position according to the place dimension in the public transport opinion data.
And sending the abnormal position and the traffic control means to corresponding staff for execution.
And associating the corresponding traffic public opinion data with the corresponding traffic control operation and updating the public opinion knowledge map.
S4: and when the processing category is long-term planning, determining a specific event according to the public transport opinion data, matching a planning processing scheme and feeding back.
And matching a historical planning scheme based on a public opinion knowledge graph through event keywords in the public opinion data.
Judging whether the planning scheme exists in a traffic construction planning list of the city, and if so, reordering the importance of the planning scheme in the traffic construction planning list; otherwise, the planning scheme is fed back to the corresponding personnel for planning suggestion.
The calculation process of the importance of the planning scheme comprises the following steps:
wherein the content of the first and second substances,
the importance of the kth plan.
And feeding the planning scheme with the reordered importance back to related personnel to carry out planning suggestion.
It should be understood that the examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Further, it should be understood that various changes or modifications of the present invention may be made by those skilled in the art after reading the teaching of the present invention, and such equivalents may fall within the scope of the present invention as defined in the appended claims.
Claims (10)
1. A public opinion knowledge graph-based digital urban traffic management method is characterized by comprising the following steps:
s1: obtaining multi-dimensional historical public transport opinion information of different cities, and constructing a public transport opinion knowledge map;
the dimension of the traffic history public opinion information comprises a place, a time, an object, an event keyword, a property and an influence;
s2: dividing a city into a plurality of control areas, collecting public transport opinion data of each control area in real time, and identifying the processing category of the collected public transport opinion data as real-time control, no processing or long-term planning according to a public transport opinion knowledge map;
s3: when the processing category is real-time management and control, determining the specific position and specific event of the abnormality according to the public traffic opinion data, and associating and executing corresponding traffic management and control operation;
s4: when the processing category is long-term planning, determining a specific event according to the public traffic opinion data, matching a planning processing scheme and feeding back;
the step S2 comprises the following steps:
s201: dividing each city into a plurality of control areas according to the location distribution of historical traffic public opinion information;
s202: collecting public traffic sentiment data and live traffic data by each control area at a set sampling frequency;
s203: judging the processing type of the public transport opinion data based on a public transport opinion knowledge graph according to the acquired public transport opinion data, and verifying the public transport opinion data by combining with the traffic situation data;
the control area division process comprises the following steps:
based on a city map, representing the public traffic opinion information on the city map in a marking mode according to the minimum location position in the location dimension; the size of the mark is a traffic influence range in influence dimensionality in public traffic opinion information;
determining path nodes after traversing all public transport opinion information; selecting a least marked coverage area on the urban map, clustering the coverage area, and determining a plurality of path nodes;
and sequentially selecting node paths between the adjacent path nodes by taking the minimum mark coverage range between the adjacent path nodes as a path range and taking the shortest distance in the path range as a node path to form a closed control area.
2. The method as claimed in claim 1, wherein each control area collects traffic public opinion data at a set public opinion sampling frequency, and adjusts the live collecting frequency according to the collected and fed back traffic live data:
wherein the content of the first and second substances,
a live acquisition frequency for an ith time period;
[ ] is the rounding calculation;
wherein the content of the first and second substances,
is a set maximum live acquisition frequency;
3. The digital urban traffic control method based on public opinion knowledge graph according to claim 2, wherein each control area respectively collects traffic live data with a set live collection frequency, and adjusts public opinion sampling frequency according to the live collection frequency:
wherein the content of the first and second substances,
the public opinion collection frequency of the ith time period;
wherein the content of the first and second substances,
the method comprises the steps of setting maximum public opinion collection frequency;
4. A public opinion map based digital urban traffic control method according to claim 1 or 3, wherein the collected public opinion data includes official public opinion data and non-official public opinion data.
5. The method as claimed in claim 4, wherein the collected public transportation data are clustered according to dimensions to form public transportation data clusters in each dimension;
taking a cluster from each dimension, and performing intersection to obtain a group of same public transport opinion data sets;
traversing all clusters, and obtaining a plurality of identical public transport opinion data sets after arrangement and combination;
and respectively matching the public transport opinion data in the same public transport opinion data set with the public opinion knowledge map to obtain corresponding processing categories.
6. The method as claimed in claim 1, wherein the historical public opinion data matched with the public opinion map and the collected live traffic data are checked to determine whether the historical public opinion data and the collected live traffic data are the same event, if yes, the corresponding matching result is executed, otherwise, the public opinion map is matched again after feedback;
if the processing categories of the public transport opinion data matching in the same public transport opinion data set are different, taking the matching result of the official public opinion data as a final result; if there is no official public opinion data, the result of most processing categories is used as the final result.
7. The method for digital urban traffic control based on public opinion knowledge graph according to claim 1, characterized in that the planning scheme of history is matched based on public opinion knowledge graph through event keywords in traffic public opinion data;
judging whether the planning scheme exists in a traffic construction planning list of the city, and if so, reordering the importance of the planning scheme in the traffic construction planning list; otherwise, the planning scheme is fed back to the corresponding personnel for planning suggestion.
8. The public opinion knowledge graph-based digital urban traffic control method according to claim 7, wherein the calculation process of the importance of the planning scheme is as follows:
wherein, the first and the second end of the pipe are connected with each other,
importance of the kth planning scenario;
9. A public opinion knowledge graph-based digital urban traffic governance method according to claim 1, 3 or 5, characterized in that when the collected public opinion data lacks information of partial dimension, data recovery is performed; if the missing dimension is time, directly ending; and if the missing dimension is an event keyword, rejecting the public transport opinion data.
10. The public opinion knowledge graph-based digital urban traffic control method according to claim 9, wherein the data restoration process is as follows:
a1: matching the public transport opinion data lacking partial dimensionality with the public opinion knowledge map, judging whether corresponding processing categories can be obtained, if so, ending, otherwise, entering the step A2;
a2: respectively arranging and combining the clusters on other dimensions to form an intersection to obtain a plurality of public opinion data sets;
a3: judging whether other public transport opinion data exist in a public opinion data set where public transport opinion data lacking dimensionality is located; if yes, entering the step A4, otherwise, entering the step A5;
a4: judging whether other complete public transport opinion data are identical in data of missing dimension, if so, repairing the data as the data of the missing dimension, otherwise, entering the step A4;
a5: and traversing the historical public transport opinion information, matching, and selecting the historical public transport opinion information with the highest similarity as a repairing object for repairing the data of the corresponding dimensionality.
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