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Search Results: 1 - 10 of 28262 matches for " Zhu Fengjuan "
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Characterizations of Tight Frame Wavelets with Special Dilation Matrices
Huang Yongdong,Zhu Fengjuan
Mathematical Problems in Engineering , 2010, DOI: 10.1155/2010/128294
Abstract: We study all generalized low-pass filters and tight frame wavelets with special dilation matrix (M-TFW), where M satisfies and generates the checkerboard lattice. Firstly, we study the pseudoscaling function, generalized low-pass filters and multiresolution analysis tight frame wavelets with dilation matrix (MRA M-TFW), and also give some important characterizations about them. Then, we characterize all M-TFW by showing precisely their corresponding dimension functions which are nonnegative integer valued. Finally, we also show that an M-TFW arises from our MRA construction if and only if the dimension of a particular linear space is either zero or one. 1. Introduction Wavelet analysis with its fast algorithms is used in many fields of applied mathematics, such as image or signal analysis and numerical treatment of operator equations (see [1–4]). Moreover, wavelet bases, recently also wavelet frames, are applied to the characterization of the function space [5]. The classical MRA wavelets are probably the most important class of orthonormal wavelets. Many of the better known examples as well as those often used in applications belong to this class. However, Journe's wavelet is not an MRA wavelet. Thus, it was a natural question to find necessary and sufficient conditions for an orthonormal wavelet to be an MRA wavelet. An interesting approach to this involves the dimension function. On the other hand, there are useful filters, such as , that do not produce orthonormal basis; nevertheless, they produce systems that have the reconstruction property, as well as many other useful features. It is natural, therefore, to develop a theory involving more general filters that do, indeed, produce systems having these properties. A natural setting for such a theory is provided by frames [1]. Several authors have considered this problem and have shown how more general filters produce such frames. A successful development of these ideas is provided by the papers [6, 7]. These results, however, do involve certain restrictions and technical assumptions such as semiorthogonality. In particular, they exclude the use of the filter we described above. A related approach can be found in [8]. Note that the design of tight wavelet frames is still a challenging problem and a number of references have dealt with this subject (see [3–25]). In [20, 21], authors successfully developed a theory of univariate tight frame wavelets and MRA tight frame wavelets. In [24], authors revealed the deep and rich structure of the set of dyadic tight frame wavelets. In [9, 10, 25], authors
Strong Global Attractors for 3D Wave Equations with Weakly Damping
Fengjuan Meng
Abstract and Applied Analysis , 2012, DOI: 10.1155/2012/469382
Abstract: We consider the existence of the global attractor 1 for the 3D weakly damped wave equation. We prove that 1 is compact in (2(Ω)∩10(Ω))×10(Ω) and attracts all bounded subsets of (2(Ω)∩10(Ω))×10(Ω) with respect to the norm of (2(Ω)∩10(Ω))×10(Ω). Furthermore, this attractor coincides with the global attractor in the weak energy space 10(Ω)×2(Ω).
A Survey on Freshmen’s Perception of Biblical Knowledge in Intercultural Communication
Fengjuan Zhang
International Journal of English Linguistics , 2012, DOI: 10.5539/ijel.v2n6p31
Abstract: To date, research on the Bible is mainly confined to literature review or argumentation. This article attempts to get a general idea of learners’ conception of biblical culture in developing intercultural communicative competence (hereafter referred to as ICC), as well as the current situation of their biblical knowledge. Data analyses in the survey have reported evidence for the positive and upward tendency among the respondents, indicating much interest and willingness to spend more extracurricular time in learning English. This survey also shows that most respondents agreed to the important role of western culture, but they did not fully perceive the important role of biblical knowledge in learning the English language. In addition, data analysis has led to the conclusion that respondents had grasped less biblical knowledge than expected. This explains the possibility and necessity to promote this positive situation. Then, some pedagogical improvements were addressed on how to affect teaching practice by integrating biblical knowledge into teaching materials.
The Necessity of Grammar Teaching
Fengjuan Wang
English Language Teaching , 2010, DOI: 10.5539/elt.v3n2p78
Abstract: Mastering grammar is the foundation in the proficiency of a language. Grammar teaching is also an essential part of language teaching. However, with the communicative approach was introduced into China, many foreign language teachers gradually make little of grammar teaching. In terms of the theory of linguistics, this paper specifically explores the status of grammar in language learning, the characteristics of foreign language learning, theoretical basis of communicative teaching approach, and the practical effect of ignoring grammar teaching to reposition grammar teaching for a comprehensive understanding of the necessity of teaching grammar.
Analysis and Design of ETL in Hospital Performance Appraisal System
Fengjuan Yang
Computer and Information Science , 2009, DOI: 10.5539/cis.v2n4p116
Abstract: Taking the hospital performance appraisal items as the background, the method and mechanism of ETL process, data extraction, data cleaning, data transformation and increment updating are concretely analyzed and designed in the article. The data preparation area is added in the ETL process of the system, and the monitoring and restarting mechanism is set up in the system, which can effectively enhance the efficiency of ETL process.
Influences of Soda Soil on the Ultrastructure and Storage Inclusions of Chloroplasts of Syringa oblata Lindl.  [PDF]
Ziguo Zhao, Fengjuan Zhao
Natural Resources (NR) , 2019, DOI: 10.4236/nr.2019.109022
Abstract: With a high pH value, soda soil restricts the growth of plants. It had previously been assumed that the inhibition of plant growth by neutral salt stress was partly due to the changes of the ultrastructure and storage inclusions of chloroplasts. The aim of this paper is to investigate the effects of alkali-salt mixed stress of soda soil on chloroplasts of higher plant Syringa oblata Lindl. Testing S. oblata plants had grown for more than five years in soda soil, and transmission electron microscope was used for determining the ultrastructure and storage inclusions of chloroplasts. The results showed that some chloroplasts were destroyed, the normal chloroplasts became smaller, and the envelopes of the functional chloroplasts were slightly expanded generally in soda-stressed plants. The most noteworthy fact was that much more starchgrains accumulated in the chloroplasts of S. oblata growing in soda soil than in neutral soil. The total contents of plastoglobules in chloroplasts did not change considerably, and plastoglobules with different electron densities appeared in chloroplasts in the plants growing in soda soil. We presume that the reduction of the volume and number of functional chloroplasts and the occupation of carbon resources by starch grains accumulated in chloroplasts were the possible reasons for the inhibition of S. oblata growth by soda soil. The accumulation of starch grains was one of the adaptive traits of S. oblata, which promoted the survival of plants in soda soil for that the starch grains could serve as a steady source
Research Progress on Aging Mechanisms  [PDF]
Qiang Wang, Fengjuan Zhou, Wenmei Xie, Xiaorong Zhao, Xuan Liu
Advances in Aging Research (AAR) , 2016, DOI: 10.4236/aar.2016.52005
Abstract: Aging refers to a gradual process of functional and organic recession with the age increased after the organism maturing. Many researchers have tried to elucidate aging mechanism which includes the free radical theory: free radicals can become lipofuscin and cause the mutations of mitochondrial DNA (mtDNA), and the damage of the nuclear DNA. From the view of heredity, aging is the results of the activation and inhibition of a series of genes as well as the products of their interaction. From the changes of immune function theory, it points out that aging is attributed to the decline of immune responses and the increase of autoimmune reactions.
An Improved Approach for Rapidly Identifying Different Types of Gram-Negative Bacterial Secreted Proteins  [PDF]
Lezheng Yu, Fengjuan Liu, Lixiao Du, Yizhou Li
Natural Science (NS) , 2018, DOI: 10.4236/ns.2018.105018
Abstract: Protein secretion plays an important role in bacterial lifestyles. In Gram-negative bacteria, a wide range of proteins are secreted to modulate the interactions of bacteria with their environments and other bacteria via various secretion systems. These proteins are essential for the virulence of bacteria, so it is crucial to study them for the pathogenesis of diseases and the development of drugs. Using amino acid composition (AAC), position-specific scoring matrix (PSSM) and N-terminal signal peptides, two different substitution models are firstly constructed to transform protein sequences into numerical vectors. Then, based on support vector machine (SVM) and the “one to one”?algorithm, a hybrid multi-classifier named SecretP v.2.2 is proposed to rapidly and accurately?distinguish different types of Gram-negative?bacterial secreted proteins. When performed on the same test set for a comparison with other methods, SecretP v.2.2 gets the highest total sensitivity of 93.60%. A public independent dataset is used to further test the power of SecretP v.2.2 for predicting NCSPs, it also yields satisfactory results.
Expression Patterns of Genes Involved in Sugar Metabolism and Accumulation during Apple Fruit Development
Mingjun Li, Fengjuan Feng, Lailiang Cheng
PLOS ONE , 2012, DOI: 10.1371/journal.pone.0033055
Abstract: Both sorbitol and sucrose are imported into apple fruit from leaves. The metabolism of sorbitol and sucrose fuels fruit growth and development, and accumulation of sugars in fruit is central to the edible quality of apple. However, our understanding of the mechanisms controlling sugar metabolism and accumulation in apple remains quite limited. We identified members of various gene families encoding key enzymes or transporters involved in sugar metabolism and accumulation in apple fruit using homology searches and comparison of their expression patterns in different tissues, and analyzed the relationship of their transcripts with enzyme activities and sugar accumulation during fruit development. At the early stage of fruit development, the transcript levels of sorbitol dehydrogenase, cell wall invertase, neutral invertase, sucrose synthase, fructokinase and hexokinase are high, and the resulting high enzyme activities are responsible for the rapid utilization of the imported sorbitol and sucrose for fruit growth, with low levels of sugar accumulation. As the fruit continues to grow due to cell expansion, the transcript levels and activities of these enzymes are down-regulated, with concomitant accumulation of fructose and elevated transcript levels of tonoplast monosaccharide transporters (TMTs), MdTMT1 and MdTMT2; the excess carbon is converted into starch. At the late stage of fruit development, sucrose accumulation is enhanced, consistent with the elevated expression of sucrose-phosphate synthase (SPS), MdSPS5 and MdSPS6, and an increase in its total activity. Our data indicate that sugar metabolism and accumulation in apple fruit is developmentally regulated. This represents a comprehensive analysis of the genes involved in sugar metabolism and accumulation in apple, which will serve as a platform for further studies on the functions of these genes and subsequent manipulation of sugar metabolism and fruit quality traits related to carbohydrates.
Poly[[dodecaaquabis(μ3-pyridine-2,6-dicarboxylato)tetrakis(μ2-pyridine-2,6-dicarboxylato)tricalciumdieuropium(III)] 10.5-hydrate]
Fengjuan Shi,Jiguang Deng,Hongxing Dai
Acta Crystallographica Section E , 2012, DOI: 10.1107/s1600536812018028
Abstract: In the title compound, {[Ca3Eu2(C7H3NO4)6(H2O)12]·10.5H2O}n, the EuIII ion is nine-coordinated by three tridentate pyridine-2,6-dicarboxylate (PDA) ligands, forming a [Eu(PDA)3]3 building block. The Ca2+ ions adopt two types of coordination geometries. One Ca2+ ion, lying on a twofold rotation axis, is eight-coordinated by four carboxylate O atoms from four PDA ligands and four water molecules, and the other two Ca2+ ions, each lying on an inversion center, are six-coordinated by two carboxylate O atoms from two PDA ligands and four water molecules. The carboxylate groups bridge the EuIII and Ca2+ ions into a three-dimensional porous framework, with channels extending along [010] and [001] in which lattice water molecules are located. Two of the lattice water molecules are disordered over two sets of sites with equal occupancy and one water molecule is 0.25-occupied. Numerous O—H...O hydrogen bonds involving the water molecules and carboxylate O atoms are present.
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