How to extract optimal composite attributes from a variety of conventional seismic attributes to detect reservoir features is a reservoir predication key,which is usually solved by reducing dimensionality.Principle co...How to extract optimal composite attributes from a variety of conventional seismic attributes to detect reservoir features is a reservoir predication key,which is usually solved by reducing dimensionality.Principle component analysis（PCA） is the most widely-used linear dimensionality reduction method at present.However,the relationships between seismic attributes and reservoir features are non-linear,so seismic attribute dimensionality reduction based on linear transforms can＇t solve non-linear problems well,reducing reservoir prediction precision.As a new non-linear learning method,manifold learning supplies a new method for seismic attribute analysis.It can discover the intrinsic features and rules hidden in the data by computing low-dimensional,neighborhood-preserving embeddings of high-dimensional inputs.In this paper,we try to extract seismic attributes using locally linear embedding（LLE）,realizing inter-horizon attributes dimensionality reduction of 3D seismic data first and discuss the optimization of its key parameters.Combining model analysis and case studies,we compare the dimensionality reduction and clustering effects of LLE and PCA,both of which indicate that LLE can retain the intrinsic structure of the inputs.The composite attributes and clustering results based on LLE better characterize the distribution of sedimentary facies,reservoir,and even reservoir fluids.展开更多
In order to provide English as a foreign language students with effective English language learning approaches, this investigation is focused on how students deal with words when they are doing reading material. It is...In order to provide English as a foreign language students with effective English language learning approaches, this investigation is focused on how students deal with words when they are doing reading material. It is found that most students can use some skills to guess the unknown words in reading materials, such as explanatory analysis skills, syntactic analysis skills, and structural analysis skills, while they have overlooked how these words are organized metaphorically and metonymically. This investigation will provide students with the target language knowledge metaphors and metonymy, examining the impact on computer vocabulary guessing and reading comprehension through teaching the concept of metaphor and metonymy. In this research, the new word-guessing skill based on the knowledge of metaphor and metonymy was applied to word-guessing teaching in reading comprehension of computer material. The research question is studied in this experiment： Can the training of using ways of word-guessing base on the knowledge of metonymy and metaphor promote students＇ ability of word guessing in reading comprehension of computer material？ The results show that students have gradually paid attention to the word-guessing skill in reading process. The skills based on the knowledge of metaphor and metonymy have helped students get the right meaning of the unknown words in computer reading materials. It has really enlarged students＇ vocabulary and improved their confidence in finishing reading.展开更多
The listening teaching to students should not be a passive acceptance process, but the use ot knowledge and non-knowledge of the language of all language information analysis processing and reconstruction of the infor...The listening teaching to students should not be a passive acceptance process, but the use ot knowledge and non-knowledge of the language of all language information analysis processing and reconstruction of the information process. The paper shows the information that listeners accept relates to a variety of factors, which is a complex psychological process and proactive thinking process. However, due to the weak language basics, unhealthy hearing psychological and incorrect hearing and learning methods seriously affect and hinder the improvement of the hearing ability of college students. Therefore, how to improve the English listening comprehension become the majority of English learners continue to explore the issues. To the right way to learn in a short period of time to improve the level of English listening, it is necessary to grasp the scientific and reasonable learning strategy.展开更多
基金National Key Science & Technology Special Projects(Grant No.2008ZX05000-004)CNPC Projects(Grant No.2008E-0610-10).
文摘How to extract optimal composite attributes from a variety of conventional seismic attributes to detect reservoir features is a reservoir predication key,which is usually solved by reducing dimensionality.Principle component analysis（PCA） is the most widely-used linear dimensionality reduction method at present.However,the relationships between seismic attributes and reservoir features are non-linear,so seismic attribute dimensionality reduction based on linear transforms can＇t solve non-linear problems well,reducing reservoir prediction precision.As a new non-linear learning method,manifold learning supplies a new method for seismic attribute analysis.It can discover the intrinsic features and rules hidden in the data by computing low-dimensional,neighborhood-preserving embeddings of high-dimensional inputs.In this paper,we try to extract seismic attributes using locally linear embedding（LLE）,realizing inter-horizon attributes dimensionality reduction of 3D seismic data first and discuss the optimization of its key parameters.Combining model analysis and case studies,we compare the dimensionality reduction and clustering effects of LLE and PCA,both of which indicate that LLE can retain the intrinsic structure of the inputs.The composite attributes and clustering results based on LLE better characterize the distribution of sedimentary facies,reservoir,and even reservoir fluids.
文摘In order to provide English as a foreign language students with effective English language learning approaches, this investigation is focused on how students deal with words when they are doing reading material. It is found that most students can use some skills to guess the unknown words in reading materials, such as explanatory analysis skills, syntactic analysis skills, and structural analysis skills, while they have overlooked how these words are organized metaphorically and metonymically. This investigation will provide students with the target language knowledge metaphors and metonymy, examining the impact on computer vocabulary guessing and reading comprehension through teaching the concept of metaphor and metonymy. In this research, the new word-guessing skill based on the knowledge of metaphor and metonymy was applied to word-guessing teaching in reading comprehension of computer material. The research question is studied in this experiment： Can the training of using ways of word-guessing base on the knowledge of metonymy and metaphor promote students＇ ability of word guessing in reading comprehension of computer material？ The results show that students have gradually paid attention to the word-guessing skill in reading process. The skills based on the knowledge of metaphor and metonymy have helped students get the right meaning of the unknown words in computer reading materials. It has really enlarged students＇ vocabulary and improved their confidence in finishing reading.
文摘The listening teaching to students should not be a passive acceptance process, but the use ot knowledge and non-knowledge of the language of all language information analysis processing and reconstruction of the information process. The paper shows the information that listeners accept relates to a variety of factors, which is a complex psychological process and proactive thinking process. However, due to the weak language basics, unhealthy hearing psychological and incorrect hearing and learning methods seriously affect and hinder the improvement of the hearing ability of college students. Therefore, how to improve the English listening comprehension become the majority of English learners continue to explore the issues. To the right way to learn in a short period of time to improve the level of English listening, it is necessary to grasp the scientific and reasonable learning strategy.
