JPH06203071A - Pattern searching device - Google Patents

Abstract

PURPOSE:To provide a pattern searching device which efficiently searches a specific pattern from a searching object expressed as a network consisting of a set of nodes and an arc between the nodes. CONSTITUTION:This device is provided with a search pattern input part 11 which inputs a pattern to be retrieved, a search order designation part 12 to designate the search order of the node included in a search pattern by a user, a general search order knowledge input part 13 which inputs general search order knowledge not depending on the search pattern, a search order synthesis knowledge input part 15 which inputs search order synthesis knowledge to synthesize search order, a search order synthesis part 17 which synthesizes new search order from the search order designated by a user, a search order edit part 18 which edits synthesized search order, and a search engine 19 which searches the search pattern from the searching object according to finally obtained search order.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pattern search device for searching for a specific pattern from a search target expressed as a network consisting of a set of nodes and arcs between nodes.

[0002]

2. Description of the Related Art An example of a network represented by a set of nodes and arcs between nodes is an electronic circuit. Elements such as transistors and resistors that form an electronic circuit correspond to nodes, connection relationships between elements correspond to arcs, and the entire circuit corresponds to a network. There is a demand to search for a specific pattern from a target expressed as such a network (hereinafter, referred to as a search target). Specifically, for example, when designing the layout of an integrated circuit, generally, the portions forming a specific pattern are collectively arranged in the vicinity of the chip, but for that purpose, it is necessary to search for the specific pattern. is there.

The search for such a specific pattern is generally performed by an inference system. When searching for this specific pattern, conventionally, the nodes and conditions included in the pattern to be searched (hereinafter referred to as the search pattern) are procedurally described. In this case, since the description of the search order of the nodes and the conditions is integrated in the procedure of describing the nodes and the conditions included in the search pattern, it is not easy to change only the search order. Further, even when the nodes included in the search pattern, their conditions, and the search order are described in a format such as the rules of the production system, the search order depends on the writing method, and therefore a detailed order cannot be specified. For these reasons, the search efficiency of the search pattern is poor in the conventional method.

Further, in any of the above-described two methods for describing the nodes included in the search pattern, the conditions thereof, and the search order, the search order must be specified individually for each search pattern. As the number of types increases, the pattern search efficiency decreases. In addition, if the pattern can be described graphically, the inference efficiency cannot be improved by specifying the search order.

[0005]

As described above, in the conventional technique, when a specific search pattern is searched from a search target expressed as a network composed of a set of nodes and arcs between the nodes, the search order is changed. However, there was a problem that the search efficiency was poor because it was not possible.

It is an object of the present invention to provide a pattern search device capable of efficiently searching for a specific pattern from a search target expressed as a network consisting of a set of nodes and arcs between nodes. .

[0007]

In order to solve the above-mentioned problems, the present invention is based on separating the description of the search pattern from the description of specifying the search order of nodes and conditions in the search pattern.

That is, the pattern searching apparatus of the present invention is
In a pattern search device for searching for a specific search pattern from a search target expressed as a network consisting of a set of nodes and arcs between nodes, a search pattern input means for inputting the search pattern and this search pattern input means Search order designating means for designating a search order of nodes included in the input search pattern,
A basic feature is to include a search means for searching a search pattern from a search target in accordance with the search order designated by the search order designation means.

Further, in the present invention, general search order knowledge input means for inputting general search order knowledge that does not depend on individual search patterns in the search order, and general search order input by this general order knowledge input means. A configuration further comprising search order combining means for combining knowledge and a search order specified by the search order specifying means to combine a new search order, and searching a search pattern from a search target according to the search order combined by the search order combining means May be

Further, a search order synthesis knowledge input means for inputting search order synthesis knowledge designating a method for synthesizing a new search order in the search order synthesis means may be further provided. Further, a search order editing means for editing the new search order combined by the search order combining means may be further provided.

[0011]

As described above, according to the present invention, by separating the description of the input search pattern from the description of the designation of the search order of the nodes and conditions in the search pattern, each description and maintenance are facilitated, and the search order is improved. It becomes possible for the user to arbitrarily specify. This improves the search efficiency of the search pattern.

If a general search order designation method is prepared as general search order knowledge, the user does not need to individually specify this general search order knowledge for each search pattern. When the search order needs to be specified individually, the search order can be specified by selecting an appropriate unit such as data or condition, so that the search efficiency of the search pattern can be easily improved by specifying and modifying the search order.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing the configuration of a pattern search apparatus according to an embodiment of the present invention, and FIG. 2 is a flowchart showing the flow of processing for designating a search order in the embodiment.

This pattern searching apparatus includes a search pattern input unit 11, a search order specifying unit 12, a general search order knowledge input unit 13, a general search order knowledge file 14, a search order synthesis knowledge input unit 15, and a search order synthesis knowledge file 16. , A search order synthesis unit 17, a search order editing unit 18, and a search engine 19.

The search pattern input unit 11 is a search pattern,
That is, the user inputs a pattern to be searched, and specifically, an editor is used for creating a search pattern and editing it as necessary. In the present embodiment, the search target is an electronic circuit, and
Elements such as resistors correspond to nodes, connection relationships between elements correspond to arcs, and circuits correspond to networks.

FIG. 3 shows an example of a search pattern, which comprises a network in which four transistors Q1 to Q4 and one resistor R are connected as shown. In addition to such a network structure, conditions such as "the resistance R has a value of 10 ohms or more" and "the upper left transistor Q1 and the upper right transistor Q2 are the same type" may be added to the search pattern. Although possible, this embodiment will be described on the assumption that such a condition is not added.

The search order designating section 12 is an editor for designating the order in which the nodes appearing in the search pattern are searched for the search pattern input by the user using the search pattern inputting section 11. . The designation of the search order by the search order designation unit 12 is called individual designation.

FIG. 4 is an example in which the search order is specified in the search pattern of FIG. 3, in which "upper left transistor Q1 → lower left transistor Q3 → upper right transistor Q2 → lower right transistor Q3 → center resistor R". It indicates that the search is specified in order.

The general search order knowledge input unit 13 is for inputting, in advance, as general search order knowledge when there is a standard for specifying a general search order that does not depend on a specific search pattern. . Regarding the search order stored as such general search order knowledge, individual specification by the search order specifying unit 12 can be omitted. The general search order knowledge thus input is stored in the general search order knowledge file 14. An example of general search order knowledge is shown below. <General Search Order Knowledge> (a) The node connected to the searched node is searched first. (B) If there is a transistor as a node that has already been searched, the node connected to the emitter or collector is searched first rather than the base of the transistor. (C) For transistors and resistors, look for the transistor first. (D) Search for a node that is connected to many already searched nodes first.

These general search order knowledges are as important as those written earlier, and when applied, those written earlier are given priority. As a result,
The process of setting the search order of is shown.

(1) First, since there is no node that has been searched at first, (c) is applied, but since there are four transistors, one of them is appropriately selected. Here, it is assumed that the upper left transistor Q1 is selected. (2) When (a) is applied, the lower left transistor Q1 and the middle resistor R remain as candidates, and (c) is applied, and the lower left transistor Q3 becomes second. (3) When (a) is applied, the transistor Q2 at the lower right and the middle resistance R remain as candidates, and when (b) is applied, the middle resistance R becomes third.

(4) By applying (1), the transistor Q3 at the lower right and the transistor Q2 at the upper right remain as candidates,
Further, by applying (d), the transistor Q4 at the lower right becomes the fourth transistor. (5) The transistor Q2 on the upper right is the last (fifth).

The search order for each pattern specified by the user in the search order specifying unit 12 and the general search order knowledge retrieved from the general search order knowledge file 14 are combined by the search order combining unit 17 to create a new search order. Is synthesized.

The search order synthesis knowledge input unit 15 is for inputting search order synthesis knowledge that specifies a method for synthesizing a new search order in the search order synthesis unit 17.
The search order synthesis knowledge input in this way is stored in the search order synthesis knowledge file 16. An example of search order synthesis knowledge is shown below. <Search Order Synthesis Knowledge> (A) If a search order is specified by the user, it is prioritized. (B) If the user does not specify the search order, the general search order knowledge is used to specify the search order. The system appropriately specifies the parts that are not determined by (C) and (B).

The search order synthesis knowledge as described above is stored in the search order synthesis knowledge file 16, and the user partially specifies the search order as shown in FIG. It is assumed that the general search order knowledge illustrated in (d) is stored in the general search order knowledge file 14. In this case, the new search order synthesized by the search order synthesis unit 17 is performed in the following process. <New Search Sequence to be Combined> (1) First, the upper left transistor Q1 is determined as the first by (A). (2) Since there is no other designation by the user, next, designation by general search order knowledge is performed in (B). (3) Due to the general search order knowledge (a) and (c), the lower left transistor Q3 becomes second. (4) Due to (1) and (2), the middle resistance R becomes the third. (5) The transistor Q at the lower right due to (1) and (4)
4 becomes the 4th. (6) The transistor Q2 on the upper right is the last (fifth). The search order obtained as described above is as shown in FIG. That is, Q1 → Q3 → R → Q4 → Q2.

In addition, since it took time to execute the search in the search order generated by the general search order knowledge in this way, when it is desired to improve efficiency, it is better for the user to change the order. It is also possible to edit (correct) only the part that seems to be good or the part that needs special ordering by the search order editing unit 18.

For example, in the above example, Q1 → Q3 → R → Q
Although a search order of 4 → Q2 is generated, in fact, the transistor Q3 at the lower left has a special condition, and if it seems that it is better to look for this transistor Q3 first, the search order is Q by the editorial department 18
The efficiency can be improved by modifying the search order such as 3 → Q1 → R → Q4 → Q2.

The information on the search order obtained as described above is input to the search engine 19, and a search pattern as shown in FIG. 3 is searched for from the network to be searched (electronic circuit in this example) according to the search order. .

The present invention is not limited to the above embodiment, but can be modified in various ways as follows. For example, the search order synthesis knowledge retrieved from the search order synthesis knowledge file 16 may be used so that the user sequentially designates a portion whose search order is not completely determined by the general search order knowledge stored in the general search order knowledge file 14. It is also possible to specify.

Similarly, the user selects the search order designation unit 12
It is also possible to check / correct the search order designated by the general search order knowledge retrieved from the general search order knowledge file 14.

On the contrary, the user can modify / change a part of the search order generated by the general search order knowledge retrieved from the general search order knowledge file 14 by the search order editing unit 18. .

Further, although an electronic circuit is shown as a network to be searched in the above embodiment, a network such as an electric power system, a water supply / sewerage pipe network, a telephone network, a computer network, or a machine configuration may be searched. Can be a network of.

[0033]

As described above, according to the present invention, the search order can be easily specified, so that a desired search pattern can be efficiently searched from an object represented as a network composed of nodes and arcs. can do. Further, it becomes possible to reduce the labor and time for developing such an inference system with high search efficiency.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of a pattern search device according to an embodiment of the present invention.

FIG. 2 is a flowchart for explaining a pattern search procedure in the embodiment.

FIG. 3 is a diagram showing an example of a search pattern for explaining the operation of the embodiment.

FIG. 4 is a diagram showing an example in which a search order is specified in the search pattern of FIG.

5 is a diagram showing an example in which a search order is partially specified in the search pattern of FIG.

FIG. 6 is a diagram showing another example in which a search order is specified in the search pattern of FIG.

[Explanation of symbols]

11 ... Search pattern input unit 12 ... Search order designation unit 13 ... General search order knowledge input unit 14 ... General search order knowledge file 15 ... Search order synthesis knowledge input unit 16 ... Search order synthesis knowledge file 17 ... Search order synthesis unit 18 ... Search order editing unit 19 ... Search engine

Claims (2)

[Claims] 1. A pattern search device for searching for a specific search pattern from a search target represented as a network consisting of a set of nodes and arcs between nodes, search pattern input means for inputting the search pattern, A search order designating means for designating a search order of nodes included in the search pattern input by the search pattern inputting means, and a search pattern is searched from the search target according to the search order designated by the search order designating means. And a search unit for performing the pattern search. 2. A pattern search device for searching for a specific search pattern from a search target represented as a network consisting of a set of nodes and arcs between nodes, search pattern input means for inputting the search pattern, A search order specifying means for specifying a search order of nodes included in the search pattern input by the search pattern input means, and a general search order knowledge for inputting general search order knowledge that does not depend on individual search patterns for the search order. General search order knowledge input means, search order combining means for combining the general search order knowledge input by the general order knowledge input means and the search order specified by the search order specifying means, and synthesizing a new search order, According to the search order synthesized by the search order synthesizing means, the search target is searched for in the search order. Pattern search apparatus characterized by comprising a search unit for searching for a pattern.