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Natural Resources 2024年第2期15卷 51-60页

作者： Bhawna Yadav Lamba sapna jain Shreya Jha Applied Science Cluster School of Engineering UPES Dehradun India Winchester High School Massachusetts USA

Energy obtained from a variety of non-renewable sources is considered unsustainable. Various fossil fuels, such as petroleum, coal, and natural gas, are among these sources. The combustion of fossil fuels resulted in the generation of greenhouse gases, which increased the amount of carbon dioxide in the atmosphere. Global warming and ozone layer degradation are the negative consequences. In a country like India, where consumable oils are still imported, it is sense to look at the possibility of using such unpalatable oils in CI engines that aren’t often utilized as cooking oil. Palm oil is a vegetable oil obtained from the monocarp of the oil palm’s crop. The main goal is to provide a low-cost, high-performance alternative to diesel. The possibility of palm oil as a realistic, modest, and effective hotspot for the generation of biodiesel is investigated in this research. The article is focused on the comparison of palm oil and diesel in terms of characteristics.

关键词： Biodiesel Transesterification Palm Oil Heterogeneous Catalyst Methyl Esters Sustainable Fuel Energy

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Correction of CT Burst Array Errors in the Generalized-Lee-RT Spaces

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Acta Mathematica Sinica,English Series 2010年第8期26卷 1475-1484页

作者： sapna jain K.P.SHUM Department of Mathematics University of Delhi Department of Mathematics The University of Hong Kong

In [jain, S.： Array codes in the generalized-Lee-RT-pseudo-metric （the GLRTP-metric）, to appear in Algebra Colloq.], jain introduced a new pseudo-metric on the space Matm×s（Zq）, the module space of all m × s matrices with entries from the finite ring Zq, generalized the classical Lee metric [Lee, C. Y.： Some properties of non-binary error correcting codes. IEEE Trans. Inform. Theory, IT-4, 77- 82 （1958）] and array RT-metric [Rosenbloom, M. Y., Tsfasman, M. A.： Codes for m-metric. Prob. Inf. Transm., 33, 45-52 （1997）] and named this pseudo-metric as the Generalized-Lee-RT-Pseudo-Metric （or the GLRTP-Metric）. In this paper, we obtain some lower bounds for two-dimensional array codes correcting CT burst array errors [jain, S.： CT bursts from classical to array coding. Discrete Math., 308-309, 1489-1499 （2008）] with weight constraints under the GLRTP-metric.

关键词： Linear array codes Lee metric RT metric CT burst array errors

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Google: A Case Study （Web Searching and Crawling）

Google: A Case Study （Web Searching and Crawling）

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2011 3rd IEEE International Conference on Information Management and Engineering(ICIME 2011)

作者： Krishan Kant Lavania Madhur Kumar Gupta sapna jain Nicy Sharma Department of Information Technology Arya Institute of Engineering & Technology Department of Computer Science Engineering Sir Chotu Ram Institute Of Engineering and Technology

today search engines are becoming necessity of most of the people in day to day life for navigation on internet or for finding anything. Search engine answer millions of queries every day. Whatever comes in our mind, we just enter the or combination of to trigger the search and get relevant result in seconds without knowing the technology behind it. I searched for "search engine" （I intentionally misspelled it） and it returned 68,900 results. In addition with this the engine returned some sponsored results across the side of the page, as well as some spelling suggestion. All in 0.36 seconds. And for popular queries the engine is even faster. For example, searches for World Cup or dance shows （both recent events） took less than .2 seconds each. To engineer a search engine is a challenging task. In this paper we present Google, most popular search engine, and in-depth description of methods and techniques that the Google uses in searching. Different search engines use different techniques for searching and algorithm to rank the pages. At the end of the paper, We compare major search engines such as Google Yahoo, Msn etc.

关键词： Google Yahoo Msn Internet World Wide Web.

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