SU1444809A1 - Device for analyzing graph parameters - Google Patents

Abstract

The invention relates to the field of computing and can be used to determine the source of a directed graph. The device contains a synchronization unit 1, a unit 2 for determining the connectivity of the graph vertices, an element OR 3, an input 4 of the initial installation of the device, a clock output 5 of the synchronization unit, an input 6 of the poll

Description

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unit 2, output 7 of the attribute of all the vertices of the graph, stop input 8 of block 1, outputs 9 of the group of block 1, input 10 set the source of the subgraph, input 11 start the device, block 12 set the topology of the graph, elements OR 13 of the group, element 14, inputs 15 for polling the verses of the graph of block 12, outputs 16 for reaching the vertices of the graph of block 12, input 17 for enabling the operation of block 12, matrix triggers 18, elements of IL 19 group, elements of group 20, elements of matrix 21 and inputs for 22 signs of branches between the vertices count. After start-up, the synchronization unit 1 performs a sequential polling of the graph nodes. In the event that the polled vertex is the source of the graph, at output 7 a logic unit level signal appears that stops the synchronization unit 1. Output 9, at which there is a high level potential, corresponds to the number of the vertex that is the source of the graph. 2 or

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The invention relates to computing and can be used to analyze the connectivity of vertices. zgraf.

The aim of the invention is to expand the functionality of the device by determining the source of the oriented graph.

FIG. 1 shows a functional diagram of the device; figure 2 - timing diagram of the synchronization unit.

The device contains a synchronization unit 1, a communication determination unit 2

the top of the graph and the OR element 3, input 4 of the initial installation of the device is connected to the sync block 1 with the same name, clock output 5 of which is connected to the polling input b of block 2 of the graph vertex connectivity determination, output 7 of the connectivity attribute of all vertices of the graph is connected to the second input of element 3 OR, the output of which is connected to input 8 of the synchronization unit 1; Mth output 9 of the group of which is connected to the M th input 10 of setting the source of the subgraph (,, .., В, where В is the number of vertices in column), input 11 start device is connected to the input start ka block 1 synchronization. The unit 2 for determining the connectivity of the graph vertices contains a block 12 of the vadani topology, a group of B elements I.PI 13, and an element 14, the output 7 of which is the output of the sign of the connectivity of all the vertices of the graph

the Mth input 10 setting the source of the subgraph is connected to the second input of the element OR 13, the output of which is connected to the input 15 of the survey of the Mth vertex of the graph of the block 12 setting the topology, the output 16 of the sign of reachability of the Kth graph of which (,,,, , B) is connected to the K-th input of the AND 14 element and to the first input of the K-th element OR 13, the input 6 of the interrogation of the connectivity determination unit 2 is connected to the input 17 of the work permit of the block 12 for setting the topology of the graph.

The block .12 of the topology set contains a matrix from B f B triggers 18, a group from B elements OR 19, a group from B elements AND 20 and a matrix from B "B elements And 21, and the input 22 indicates the presence of a branch from Mth to K- The top of the graph is connected to the input of the installation in the unit of the K-th trigger of the Nth row matrix.

The device works as follows.

. Before starting work, input level 4 is supplied with a pulse level signal. 1, when this occurs, the initial state of the unit 2 for determining the connectivity of the vertices of the graph and the synchronization unit 1 is set. In block 2 information about the topology of the graph is entered. A single-level impulse signal is supplied to the start-up input 11, and the synchronization unit 1 forms a pulse

Level 1 signals in accordance with the time operation diagram (figure 2). A pulse signal of level 1 appears at the first output 9 of block 1 of synchronization, and block 2 is prepared for the definition of the vertices connected to the first vertex. After a time T1 sufficient to prepare block 2, block 1 of synchronization generates a pulse signal of level 1 at output 5, and interrogation of block 2 is performed. In case all the vertices of the graph are connected, output 7 of the block

2 a level-15 pulse signal appears in the zero state. A unit-level pulse signal (. If there is a branch from the M-th to the K-th peak of gran 1) is fed to the input 22 of the installation into the unit of the M-th trigger of the 18th K row of the matrix, and the synchronization unit 1 is stopped, and the potential of the level 1 on the first output 9 of block 1, synchronization is a sign that the first vertex of the source is 20 F). Thus, the topology of the graph is defined (i.e., from the first verpin of the MO-F, in accordance with its matrix, any verine of the graph can be reached). In the event that all the other vertices cannot be reached from the first vertex, the signal at output 7 of block 2 does not appear and after a time T2 sufficient for polling block 2, block 1 of synchronization removes the signals. If there are level 1 signals at the work enable input 17 and the M th input 15 of the polling, unit 12 outputs 25 level 1 signals to those outputs 16 corresponding to which the flip-flops 18 of the Mth row of the matrix are set to one.

Claims (1)

level 1 from its first exit 9 and forms it in the second end of the claim. Course 9. After that, the operation of the device is repeated. If the graph has no source, then through B of the polling cycles a level 1 signal appears on B + 1 Device for analyzing the parameters of the graph, containing a matrix of V l In exit 9. When this occurs, the stop of the triggers stops, where B is the number of verpshn  l - T „P. block synchronization, and the level 1 potential at B + 1 of the output of block I is a sign of the absence of a source in the graph. Block 2, the definition of connectivity works in the following manner. Before starting work, input 4 of the initial setup serves a pulse in a graph, a matrix of I / O B elements AND, the first group of B elements OR, and an element AND, the input of the initial installation of the device is connected to the input Q dam of the installation in O of all the matrix triggers, the input The sign of the way from M to K to the top of the graph (,., B;,.,., B) is connected to the installation input of the 1 K th trigger of the M th row of the matrix, the output of which is connected to the first input K th element And the M-th row of the matrix, the output of which is connected to the M-th input of the K-th element OR of the first group, the output of which is connected To the K th input of the element I, characterized in that, in order to expand the functional capabilities of the device by determining the source of a directed graph, level signal In this case, the initial state of the block 12 is set to the topology of the graph. In block 12, the topology of the graph is entered. When a source of a subgraph of a level 1 signal arrives at the M-th input 10, it performs a survey of the M-th vertex of the graph, while block 12, if there is a level 1 signal at input 17 of the operation enable in the column, the matrix of the I / O elements AND, the first group of B elements OR, and the element AND, the input of the initial installation of the device is connected to the inputs Q of the installation in O of all the matrix triggers, the input of the sign of the single path from M to K the top of the graph (,., В,.,., В) is connected to the input of the installation of the 1 Kth trigger of the Mth row of the matrix, the output of which is connected to the first input of the Kth element of the Mth row of the matrix, the output of which is connected to the Mth input of the Kth element OR of the first group, the output of which is connected to the Kth input of the AND element, characterized in that, in order to expand functionality of the device by determining the source directed graph, 50 outputs 16 signals ypoB-gj to its outputs. it contains the second group from В н 1, the positions of which correspond to the elements OR, the group from В elements to the composition of the links connected with the M-th. These signals are sent to the corresponding inputs 15 and over time. And, the OR element and the synchronization unit, the start input of which is the device start input, the initial input sufficient for terminating the transient processes, at the outputs 16, the composition of all the verigin connected to the M-th is formed. If all the vertices of the graph are connected, the output of the element is a signal of the level of 1 (1), which, as an indication of the connectivity of all the vertices of the graph, goes to the output 7 of block 2. Block 12 task topology works as follows. The level 1 signal at input 4 sets all the matrix triggers 18 Fa). Thus, the topology of Gra-F is set in accordance with its mix matrix. nosti. If there are level 1 signals at the work enable input 17 and the M th input 15 of the polling, unit 12 outputs the level 1 signals to those outputs 16 corresponding to which the triggers 18 of the Mth row of the matrix are set to one. Invention Formula Device for analyzing the parameters of the graph, containing a matrix of V l In triggers, where B is the number of verpshn l - T „P. in the column, the matrix of the I / O elements AND, the first group of the B elements OR, and the element AND, the input of the initial installation of the device is connected to the inputs of the installation in O of all the matrix triggers, the input of the sign of the single path from the M-th to K- the top of the graph (,. ,, В;,.,., В) is connected to the input of the installation of the 1 K th trigger of the M th row of the matrix, the output of which is connected to the first input of the K th element of the M th row of the matrix, the output of which is connected to the Mth input of the Kth element OR of the first group, the output of which is connected to the Kth input of the AND element, characterized in that, in order to expand The functionality of the device by determining the source of a directed graph, it contains the second group of B elements OR, a group of B elements And, the OR element and the synchronization block, the start input of which is the device start input, the initial setup input of the device is connected to the sync block of the same name, the output of which is connected to the first inputs of all AND group elements, the output of the Kth OR element of the first group is connected to The first input of the K-th element OR of the second group, the M-th output of the synchronization block group, is the code of the sign that the M-th vertex is the source of the device graph and is connected to the second input of the M-th OR element of the second group, the output of which is .g. connected to the second input of the M-th element AND group, the output of which is connected to the second inputs of all elements AND the M-th row of the matrix () -th output of the synchronization unit group is the output of the absence of source attribute in the device graph and connected to the first input of the OR element , the output of the element And is connected to the second input of the element ИШi, the output of which is connected to the input of the stop of the synchronization unit.