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Search Results: 1 - 10 of 245237 matches for " YANG Shi'e "
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Energy Identities of ADI-FDTD Method with Periodic Structure  [PDF]
Rengang Shi, Haitian Yang
Applied Mathematics (AM) , 2015, DOI: 10.4236/am.2015.62025
Abstract: In this paper, a new kind of energy identities for the Maxwell equations with periodic boundary conditions is proposed and then proved rigorously by the energy methods. By these identities, several modified energy identities of the ADI-FDTD scheme for the two dimensional (2D) Maxwell equations with the periodic boundary conditions are derived. Also by these identities it is proved that 2D-ADI-FDTD is approximately energy conserved and unconditionally stable in the discrete L2 and H1 norms. Experiments are provided and the numerical results confirm the theoretical analysis on stability and energy conservation.
Responsible Leadership: Review and Prospects  [PDF]
Yang Shi, Maolin Ye
American Journal of Industrial and Business Management (AJIBM) , 2016, DOI: 10.4236/ajibm.2016.68083
Abstract: The responsible leadership has gained considerable attention in contemporary management scholarship. As a new leadership theory, responsible leadership transcends traditional dyadic leader-subordinate relationship, and focuses on a full-range view of leader-stakeholder relationship, which can effectively deal with new challenges from all sectors of society. In this paper, we first provide an overview of the conception, structure, and measurement of responsible leadership. Besides, we analyze and conclude the antecedents and consequences of responsible leadership. Finally, we put forward some suggestions about future research in this field.
Phylogenetic position ofSchnabelia, a genus endemic to China: Evidence from sequences of cpDNAmatK gene and nrDNA ITS regions
Suhua Shi,Yaqing Du,D. E. Boufford,Xun Gong,Yelin Huang,Hanghang He,Yang Zhong
Chinese Science Bulletin , 2003, DOI: 10.1007/BF03183964
Abstract: The chloroplast gene matK and the internal transcribed spacers (ITS) of the nuclear ribosomal DNA fromSchnabelia, a genus endemic to China, and 6 genera of Verbenaceae and 13 genera of Lamiaceae were sequenced. The phylogenetic signal and validity outgroups were measured and evaluated by means of the relatively apparent synapomorphy analysis (RASA). Independent and combined phylogenetic analyses for the matK and ITS sequences were performed using the maximum parsimony (MP), neighborjoining (NJ) and maximum likelihood (ML) methods, indicating thatSchnabelia oligophylla andCaryopteris terniflora form a sister-group relationship. TheCaryopteris complex is not shown to be a monophyly becauseTrichostema, C. paniculata andC. forrestii are paraphyletic to the clade containing the remaining members of the complex. A monophyly of Ajugoideae proposed by Cantino et al., including 8 genera in this study, is strongly supported and the closest relatives ofSchnabelia are in the Ajugoideae (Lamiaceae), especially nearCaryopteris terniflora. The polygenetic analyses also showed that the genera of Lamiaceae and Verbenaceae sampled in this tudy are phylogenetically mixed and the genusAvicennia is distant to other genera of Verbenaceae. RASA and combined analysis can be used as effective approaches to determining the relationships among phylogenetically complex groups.

Jia Yu,Ma Bing-xian,Shen San-guo,Yang Shi-e,

中国物理 B , 1999,
Abstract: Using the scattering-theoretic method and employing the nearest-neighbor tight-binding formalism to describe the bulk electronic structure, we have studied the electronic structure of Si(337) surface. The wave-vector-resolved layer densities of states are presented. The results show that there are six surface bound states in the range from -12.0 to 2.0 eV. Some properties of these surface states are discussed.
Complete Mitogenomes of Euploea mulciber (Nymphalidae: Danainae) and Libythea celtis (Nymphalidae: Libytheinae) and Their Phylogenetic Implications
Jiasheng Hao,Min?e Sun,Qinghui Shi,Xiaoyan Sun,Lili Shao,Qun Yang
ISRN Genomics , 2013, DOI: 10.1155/2013/491636
Abstract: The complete mitochondrial genome sequences of the two butterfly species Euploea mulciber (Lepidoptera: Nymphalidae: Danainae) and Libythea celtis (Lepidoptera: Nymphalidae: Libytheinae) were determined in this study, comprising 15,166?bp and 15,164?bp, respectively. The orientation and the gene order of the two mitogenomes are identical to those of most of the other lepidopteran species. All protein-coding genes of Euploea mulciber and Libythea celtis mitogenomes start with a typical ATN codon with the exception of COI gene which uses CGA as its initial codon. All tRNA genes possess the typical cloverleaf secondary structure except for tRNASer (AGN), which has a simple loop with the absence of the DHU stem. There are short microsatellite-like repeat regions, but no conspicuous macrorepeats scattered throughout the A + T-rich regions. Phylogenetic analysis among the available butterfly species suggests that Libythea celtis (Libytheinae) is closely related to Calinaga davidis (Calinaginae), indicating that the subfamily Libytheinae may not represent a basal lineage of the Nymphalidae as previously suggested, and that Euploea mulciber stands at the base of the nymphalid tree as a sister to all other nymphalids. 1. Introduction The animal mitochondrial genome (mitogenome) is a circular molecule of 15–20?kb in length. It contains 37 conserved genes including 22 transfer RNA genes (tRNAs), 2 ribosomal RNA genes (rRNAs), and 13 protein-coding genes (PCGs) involved in electron transport and oxidative phosphorylation [1, 2]. It also contains an A + T-rich region which is the largest noncoding area involved in the initiation and regulation of replication and transcription [3]. Mitogenome studies are important for comparative and evolutionary genomics, phylogenetics, molecular evolution, and population genetics due to the genome’s unique features, such as maternal inheritance, lack of extensive recombination, and accelerated nucleotide substitution rates [4, 5]. The Lepidoptera (butterflies and moths) is probably the largest insect order, containing over 165,000 described species. The systematics of the lepidopteran higher groups has long been a matter of contention [6–8]. In China, Chou’s taxonomic system [9] is widely adopted, in which the Chinese butterflies are split into 12 families and 32 subfamilies based on their morphological characteristics. However, another taxonomic system proposed by Wahlberg et al. (2005) [10], which is followed herein, has been commonly accepted by most butterfly researchers. In this system, the butterflies are classified into 2
Perfectly Matched Layer for an Elastic Parabolic Equation Model in Ocean Acoustics Perfectly Matched Layer for an Elastic Parabolic Equation Model in Ocean Acoustics
XU Chuanxiu,ZHANG Haigang,PIAO Shengchun,YANG Shi'e,SUN Sipeng,TANG Jun
- , 2017,
Abstract: The perfectly matched layer(PML) is an effective technique for truncating unbounded domains with minimal spurious reflections. A fluid parabolic equation(PE) model applying PML technique was previously used to analyze the sound propagation problem in a range-dependent waveguide(Lu and Zhu, 2007). However, Lu and Zhu only considered a standard fluid PE to demonstrate the capability of the PML and did not take improved one-way models into consideration. They applied a [1/1] Padé approximant to the parabolic equation. The higher-order PEs are more accurate than standard ones when a very large angle propagation is considered. As for range-dependent problems, the techniques to handle the vertical interface between adjacent regions are mainly energy conserving and single-scattering. In this paper, the PML technique is generalized to the higher order elastic PE, as is to the higher order fluid PE. The correction of energy conserving is used in range-dependent waveguides. Simulation is made in both acoustic cases and seismo-acoustic cases. Range-independent and range-dependent waveguides are both adopted to test the accuracy and efficiency of this method. The numerical results illustrate that a PML is much more effective than an artificial absorbing layer(ABL) both in acoustic and seismo-acoustic sound propagation modeling
Preparation and application of chitosan nanoparticles and nanofibers
Zhao, Li-Ming;Shi, Lu-E;Zhang, Zhi-Liang;Chen, Jian-Min;Shi, Dong-Dong;Yang, Jie;Tang, Zhen-Xing;
Brazilian Journal of Chemical Engineering , 2011, DOI: 10.1590/S0104-66322011000300001
Abstract: encapsulation and immobilization technology is important for the food processing and bioengineering industries. chitosan is a natural polysaccharide prepared by the n - deacetylation of chitin. it has been widely used in food and bioengineering industries, including the encapsulation of active food ingredients, in enzyme immobilization, and as a carrier for controlled drug delivery, due to its significant biological and chemical properties such as biodegradability, biocompatibility, bioactivity, and polycationicity. in this work, chitosan nanoparticles and nanofibers used to encapsulate bioactive substances and immobilize enzymes were reviewed. preparation of chitosan nanoparticles and nanofibers, including the work achieved in our group on chitosan nanoparticles for enzyme immobilization, were also introduced. some problems encountered with nano - structured chitosan carriers for bioactive substance encapsulation and enzyme immobilization were discussed, together with the future prospects of such systems.
Attenuation Performance of a Semi-Active Helmholtz Resonator in a Grazing Flow Duct  [PDF]
Xiaofeng Shi, Cheuk Ming Mak, Jun Yang
Open Journal of Acoustics (OJA) , 2013, DOI: 10.4236/oja.2013.31004

Side branch Helmholtz resonators (HRs) are widely used to control low frequency tonal noise in air duct system. The passive Helmholtz resonator only works effectively over a narrow frequency range around resonance frequency. Changes in the exciting frequency and temperature will decrease the noise reduction performance. Many studies have been conducted on incorporating a Helmholtz resonator with active noise control to tuning the resonance frequency of HRs. The objective of this study is to study the effect of flow on the semi active Helmholtz resonator for duct noise control. Owing to a low Mach number air flow, the discontinuity condition at the joint is analytically formulated according to the conservation of the momentum and mass of air flow. Based on the transfer function at the junction, a controller function is proposed to tune the semi-active Helmholtz resonator under flow condition.

Microwave-assisted wet chemical synthesis: advantages, significance, and steps to industrialization  [PDF]
Shangzhao Shi, Jiann-Yang Hwang
Journal of Minerals and Materials Characterization and Engineering (JMMCE) , 2003, DOI: 10.4236/jmmce.2003.22009
Abstract: Previous research has revealed several advantages from microwave-assisted wet chemical synthesis in reaction acceleration, yield improvement, enhanced physicochemical properties and the evolvement of new material phases. The study present examples that demonstrate the significance of these advantages to industrial application. In order to achieve successful industrial application there is a need to distinguish between the microwave athermal (not excited by heat) effect from the microwave-induced thermal effect (temperature rise). The optimization of this new process has to be systematically investigated, so the advantages and benefits of this new technology can be fully exploited.
Plasma spray fabrication of near-net-shape ceramic objects  [PDF]
Shangzhao Shi, Jiann-Yang Hwang
Journal of Minerals and Materials Characterization and Engineering (JMMCE) , 2003, DOI: 10.4236/jmmce.2003.22012
Abstract: Among near net shape approaches, plasma spray deposition has its own advantages. It can perform ultrahigh temperature heating, produce components with layered compositions and structures, and fabricate thin-wall and large diameter objects. In this paper, the microstructural characteristics and their influential factors were reviewed in the light of the plasma spray forming process.
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