نتایج جستجو برای: and expansion
تعداد نتایج: 16844987 فیلتر نتایج به سال:
One of the dramatic developments in bandwidth-efficient communications over the past few years is the introduction and rapid applications of combined coding and bandwidth efficient modulation, known as coded modulation, for error control. Using coded modulation, reliable data transmission can be attained without compromising bandwidth efficiency. In this report, we present the basic concepts of...
Query expansion has long been suggested as a technique for dealing with word mismatch problem in information retrieval. In this paper, we describe a novel query expansion method which incorporates text mining techniques into query expansion for improving Chinese information retrieval performance. Unlike most of the existing query expansion strategies which generally select indexing terms from t...
Extended Abstract Introduction Urban sprawl is considered as one of the well-known patterns of urban expansion, which means uncontrolled physical expansion of cities on agricultural land or undeveloped surrounding areas. What today is known as sprawl describes scattered and low-density urban expansion. Patterns of urban sprawl expansion could have adverse consequences, such as increas...
Background: Tooth damage is one of the most common reasons that patients visit the dentists. Nowadays composites are increasingly used in dentistry because they have the colour of tooth and are more compatible with tooth tissue. Hygroscopic expansion is one of the most reasons that reduce the efficacy of the composite. Main goal of this article is to compare the hygroscopic expansion ...
Nowadays, irregular horizontal expansion of the cities is one of the nation’s major problems, having been given way to as a result of ever-increasing importance attached to the cities and their population concentration. The problems of the cities are the intertwined structural, economic, social, and environmental factors resulting from irregular horizontal expansion. However, despite difficulti...
After World War II, the need for skilled labors in the economic market and democratic demands provided the setting for higher education expansion in all over the world and this has become a universal phenomenon. In addition, higher education in Iran that initiated with the justice-seeking goals has experienced significant expansion in the last two decades. Nowadays expansion of higher educatio...
formulae expressing explicitly the coefficients of an expansion of double jacobi polynomials which has been partially differentiated an arbitrary number of times with respect to its variables in terms of the coefficients of the original expansion are stated and proved. extension to expansion of triple jacobi polynomials is given. the results for the special cases of double and triple ultraspher...
tehran as the biggest metropolitan of iran is located in the areas that are at high-risk of earthquake. what increases tehran's vulnerability toward earthquake is the urban physical expansion in vaious dimensions. since the analysis of the mentioned expansion is a solution to many urban problems, the effects of tehran expansion in increasing vulnerability to earthquake has been surveyed in...
Formulae expressing explicitly the coefficients of an expansion of double Jacobi polynomials which has been partially differentiated an arbitrary number of times with respect to its variables in terms of the coefficients of the original expansion are stated and proved. Extension to expansion of triple Jacobi polynomials is given. The results for the special cases of double and triple ultraspher...
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