LR(0) Parsing.pptx
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This document discusses LR(0) parsing and the steps to construct an LR parsing table from a context-free grammar. It explains that an augmented grammar is created with a new starting symbol to indicate when parsing should stop. The steps are to write the augmented grammar, find the LR(0) collection of items, and define the goto and action functions to populate the parsing table. An example grammar of S->AA, A->aA|b is used to demonstrate how to construct the LR parsing table through these steps.
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International Conference on NLP, Artificial Intelligence, Machine Learning an...
International Conference on NLP, Artificial Intelligence, Machine Learning and Applications (NLAIM 2024) offers a premier global platform for exchanging insights and findings in the theory, methodology, and applications of NLP, Artificial Intelligence, Machine Learning, and their applications. The conference seeks substantial contributions across all key domains of NLP, Artificial Intelligence, Machine Learning, and their practical applications, aiming to foster both theoretical advancements and real-world implementations. With a focus on facilitating collaboration between researchers and practitioners from academia and industry, the conference serves as a nexus for sharing the latest developments in the field.
Low power architecture of logic gates using adiabatic techniques
The growing significance of portable systems to limit power consumption in ultra-large-scale-integration chips of very high density, has recently led to rapid and inventive progresses in low-power design. The most effective technique is adiabatic logic circuit design in energy-efficient hardware. This paper presents two adiabatic approaches for the design of low power circuits, modified positive feedback adiabatic logic (modified PFAL) and the other is direct current diode based positive feedback adiabatic logic (DC-DB PFAL). Logic gates are the preliminary components in any digital circuit design. By improving the performance of basic gates, one can improvise the whole system performance. In this paper proposed circuit design of the low power architecture of OR/NOR, AND/NAND, and XOR/XNOR gates are presented using the said approaches and their results are analyzed for powerdissipation, delay, power-delay-product and rise time and compared with the other adiabatic techniques along with the conventional complementary metal oxide semiconductor (CMOS) designs reported in the literature. It has been found that the designs with DC-DB PFAL technique outperform with the percentage improvement of 65% for NOR gate and 7% for NAND gate and 34% for XNOR gate over the modified PFAL techniques at 10 MHz respectively.
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LR(0) Parsing.pptx
- 3. Augmented grammar If P is a grammar with starting symbol S,then G’ (augmented grammar for G) is a grammar with a new starting symbol S‘ and productions S-> .S‘ . The purpose of this new starting production is to indicate the parser when it should stop parsing. The ‘ . ‘ before S indicates the left side of ‘ . ‘ has been read by a compiler and the right side of ‘ . ‘ is yet to be read by a compiler.
- 4. Steps for constructing the LR parsing table : Writing augmented grammar LR(0) collection of items to be found Defining 2 functions: goto(list of terminals) and action(list of non-terminals) in the parsing table.
- 5. Construct a LR parsing table for the given context free grammar – S–>AA A–>aA|b
- 6. STEP 2 – Find LR(0) collection of items
- 8. STEP3 – defining 2 functions:goto[list of terminals] and action[list of non-terminals] in the parsing table
- 10. Thank you