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1.
Property path is the latest navigational extension of the standard query language SPARQL 1.1 for the Semantic Web.However,in the existing SPARQL query systems which support property path,the query efficiency is very low and does not support reasoning.This paper proposes a new existential semantics which has polynomial-time evaluation complexity and an equivalent relationship with the current semantics,and transforms the property path expressions to the extended nested regular expressions based on the existential semantics and proves the semantic equivalence after the transformation considering the RDFS semantics.The property path query engine is achieved by implementing the nested regular expressions algorithm and the transformation rules from the property path expressions to the nested regular expressions,which maintains the syntax simplicity of property path and the goal-oriented polynomial-time reasoning to avoid computing the RDF graph closure.The experiment results not only show the characteristics of query engine based on the existential semantics in efficiency and reasoning,but also further validate the equivalence between the results based on current semantics and those based on the existential semantics for property path after the removal of duplicate values. 相似文献
2.
《海外英语》2012,(17):173-175
The expressions are the mirrors of the cultural diversities,and usually different cultural connotations bring them quite surprising associations.So it is important to analyze the similarities and differences of cultural connotations in different languages.With animal expressions as target,the paper analyzes cultural connotations in the expressions involving animals in English and Chinese comparatively by a number of examples.This may help people gain a comprehensive and deeper insight into different cultural connotations of English and Chinese idioms,and further improve the communication of the two cultures. 相似文献
3.
《海外英语》2005,(Z1)
One of the interesting things to do in everyday life is to observe how people use different expressions for the same event and the same expression for different events.Today,let's have a little chat on some of the frequently used English expressions and how and where they are used. 相似文献
4.
《英语大王(小学)》2014,(12):26-29
Look at the funny pieties and read the sentences. You will tirol it eosy to remember the words and their sounds! 相似文献
5.
琪琪 《英语大王(小学)》2013,(11):30-31
Look at the funny pictures and read the sentences. You will findit easy to remember the words! 相似文献
6.
琪琪 《英语大王(小学)》2014,(9):28-29
Look at the funny pictures and read the sentences. You will find it easy to remember the words and their sounds （发音）! 相似文献
7.
琪琪 《英语大王(小学)》2013,(12):30-31
Look at the funny pictures and read the sentences. You will find it easy to remember the words! 相似文献
8.
琪琪 《英语大王(小学)》2014,(7):60-63
Look at the funny pictures and read the sentences, You will find it easy to remember the words and sounds! 相似文献
9.
琪琪 《英语大王(小学)》2014,(11):26-27
Look at the funny pictures and read the sentences. You will find it easy to remember the words and their sounds! 相似文献
10.
琪琪 《英语大王(小学)》2014,(1):60-63,79
Look at the funny pictures and read the sentences. You will find it easy to remember（记住） the words and their sounds （发音）! 相似文献
11.
Dying is a terrible thing, something that should not happen to anyone. Yet the word “dead” has given American English some of its liveliest expressions. One of the first of these expressions seems to have begun in England more them 600 years ago. 相似文献
12.
琪琪 《英语大王(小学)》2014,(10):26-29
Look at the funny pictures and reaa i he sentences. You will find it easy to remember the words and their sounds! 相似文献
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14.
《中学科技》2008,(2):27-27
Even with the best will in the world, reducing our carbon emissions is not going to prevent global warming. It has become clear that even if we take the strongest measures to （A） c____ emissions, the uncertainties in our climate models still leave open the possibility of extreme warming and rises in sea（1） 1___. At the same time, resistance by governments and special interest groups possible that the actions suggested by climate （B） s___. might not makes it quite be implemented soon enough. 相似文献
15.
《海外英语》2014,(5):28-28
The verb take is extremely useful. It can be used in a number of expressions. Here are 12.Learning Expressions The best way to learn any words or expressions is by seeing or hearing them in context when you＇ re reading or listening to English. Make a note of any words or expressions that you like （or want to learn） and write these down in sentences. Remember, always record language in phrases or sentences--never as individual words. You should also practise using the words or expressions as often as you can： in conversation, on the phone, in e-mails, etc. 相似文献
16.
The tridiagonal coefficient matrix for the ＂fixed-fixed＂ spring-mass system was obtained by changing spring length. And then a new algorithm of the inverse problem was designed to construct the masses and the spring constants from the natural frequencies of the ＂fixed-fixed＂ and ＂fixed-fres＂ spring-mass systems. An example was given to illustrate the results. 相似文献
17.
Purpose：
Knowledge aim： New words and the expressions
Ability aim： Train students to express the thing they like better by the pattern ＂I prefer....＂ 相似文献
18.
Purpose:Knowledge aim:New words and the expressions Ability aim:Train students to express the thing they like better by the pattern “I prefer....” 相似文献
19.
《海外英语》2014,(10):24-24
This month we are looking at some typical words, expressions collocations and forms related to the word ＂price＂ Listen and repeat the following expressions.Price 1. They are going to raise prices. 2. There has been a 15% price rise over the past two months. 3. How did you price this product？ 4. The price tag had 16 euros written on it. 5. There has been a sharp increase in the price of petrol. 相似文献
20.
《海外英语》2014,(2):10-10
Do you know all the laws in your country？ What about America？ America has some incredible laws. Do you know that in the state of Alabama it＇ s illegal for donkeys to sleep in bathtubs？ Yes, that＇s it. You are prohibited from taking your pet donkey and placing him in the bath in order to wash him. This is the start of a new mini-series on some of America＇s dumbest laws. Here are some from Alabama, Alaska and Arizona （US English spelling） 相似文献