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Search Results: 1 - 10 of 173302 matches for " Li Hong-Yan "
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Predicting Internet Time-delay Based on AR Model and Neural Network
基于AR模型与神经网络预测互联网时延*

LI Hong-yan,
李红艳

计算机应用研究 , 2006,
Abstract: After analyzing Internet communication features, the AR model and adaptive linear neural network model are adopted to predict the uncertain Internet time-delay. The simulation results for time-delay prediction illustrate that the AR model and the adaptive linear neural network provide two kind of promising ways to predict the Internet time-delay. The resulting statistics of simulation experiments also show that the adaptive linear neural network has a better prediction performance than AR model,
Design of Embedded E-Trade Information Terminal Based on ARM and μC/OS-Ⅱ
基于ARM与μC/OS-Ⅱ的嵌入式信息交互终端设计

LI Hong-Yan,
李红艳

计算机系统应用 , 2011,
Abstract: 为了满足终端系统对处理速度、实时性和可扩展性等技术指标方面的更高需求,以高性能的32 位嵌入式ARM 芯片为处理器,采用嵌入式实时操作系统μC/OS-Ⅱ,设计了一种软硬件易移植、易裁减,结构优化的电子交易信息终端。根据资源需求,给出了终端系统设计的硬件结构。在硬件目标平台上移植了μC/OS-Ⅱ操作系统,构建了嵌入式软件开发平台,提出了新颖的带中间件模块设计的系统软件结构,确定了系统任务划分及优先级设定,并给出了主程序执行流程,同时阐述了系统实现的一些关键技术。通过中间件模块设计方案增强了系统软件的可移植性、可扩展性和开发效率,由此设计的终端稳定可靠。
Near -Compactness in -Topological Spaces
Hong-Yan Li,Fu-Gui Shi
International Journal of Mathematics and Mathematical Sciences , 2007, DOI: 10.1155/2007/80451
Abstract: The notion of near S*-compactness is introduced in L-topological spaces based on S*-compactness. Its properties are researched and the relations between it and other near compactness are obtained. Moreover many characterizations of near S*-compactness are presented.
The Characteristics of Chinese Orthographic Neighborhood Size Effect for Developing Readers
Jing Zhao, Qing-Lin Li, Hong-Yan Bi
PLOS ONE , 2012, DOI: 10.1371/journal.pone.0046922
Abstract: Orthographic neighborhood size (N size) effect in Chinese character naming has been studied in adults. In the present study, we aimed to explore the developmental characteristics of Chinese N size effect. One hundred and seventeen students (40 from the 3rd grade with mean age of 9 years; 40 from the 5th grade with mean age of 11 years; 37 from the 7th grade with mean age of 13 years) were recruited in the study. A naming task of Chinese characters was adopted to elucidate N-size- effect development. Reaction times and error rates were recorded. Results showed that children in the 3rd grade named characters from large neighborhoods faster than named those from small neighborhoods, revealing a facilitatory N size effect; the 5th graders showed null N size effect; while the 7th graders showed an inhibitory N size effect, with longer reaction times for the characters from large neighborhoods than for those from small neighborhoods. The change from facilitation to inhibition of neighborhood size effect across grades suggested the transition from broadly tuned to finely tuned lexical representation in reading development, and the possible inhibition from higher frequency neighbors for higher graders.
O R-CONVERGENCE AND WEAK O R-CONVERGENCE OF NETS AND THEIR APPLICATIONS
LI,HONG-YAN; SHI,FU-GUI;
Proyecciones (Antofagasta) , 2008, DOI: 10.4067/S0716-09172008000100005
Abstract: in this paper, the theory of or-convergence and weak or-convergence of nets is introduced in l-topological spaces by means of neighborhoods and strong neighborhoods of fuzzy points based on shi?s o-convergence. it can be used to characterize preclosed sets, preopen sets, δ-closed sets, δ-open sets, near compactness and near s*-compactness
(E)-N′-(4-Hydroxybenzylidene)-4-hydroxybenzohydrazide methanol solvate
Cong-Ming Li,Hong-Yan Ban
Acta Crystallographica Section E , 2009, DOI: 10.1107/s1600536809020078
Abstract: The title compound, C14H12N2O3·CH4O, consists of a Schiff base molecule and a methanol molecule of crystallization. The Schiff base molecule is nearly planar, the dihedral angle between the planes of the two benzene rings being 7.2 (2)°. The molecule exists in the trans configuration with respect to the methylidene unit. In the crystal structure, the Schiff base and methanol molecules are linked through O—H...O, N—H...O and O—H...N hydrogen bonds, forming a three-dimensional network.
(E)-4-Hydroxy-N′-(4-nitrobenzylidene)benzohydrazide
Cong-Ming Li,Hong-Yan Ban
Acta Crystallographica Section E , 2009, DOI: 10.1107/s1600536809020066
Abstract: The molecule of the title compound, C14H11N3O4, is approximately planar, the dihedral angle between the planes of the two substituted benzene rings being 2.54 (7)°. The molecule exists in a trans configuration with respect to the central methylidene unit. In the crystal structure, molecules are linked through intermolecular O—H...O, N—H...O and C—H...O hydrogen bonds, forming layers parallel to (101). The O/N—H...O and C—H...O interactions form a pair of bifurcated acceptor bonds involving the cabonyl/nitro O atom, generating an R21(6) motif.
(E)-N′-(5-Bromo-2-methoxybenzylidene)-3-methoxybenzohydrazide
Cong-Ming Li,Hong-Yan Ban
Acta Crystallographica Section E , 2009, DOI: 10.1107/s1600536809010435
Abstract: In the title compound, C16H15BrN2O3, there are two independent molecules (A and B) in the asymmetric unit. The major difference between the two molecules is the dihedral angle formed by the aromatic rings [72.6 (2) and 18.8 (2)° for A and B, respectively]. The benzohydrazide groups are not planar and the molecules exist in trans configurations with respect to the methylidene units. The molecular packing is stabilized by two intermolecular N—H...O hydrogen bonds, forming chains parallel to the c axis. Only the A molecules of the asymmetric unit are held together by π–π interactions [centroid–centroid distance = 3.714 (3) ].
(E)-N′-[1-(2-Hydroxyphenyl)ethylidene]-3-methoxybenzohydrazide
Cong-Ming Li,Hong-Yan Ban
Acta Crystallographica Section E , 2009, DOI: 10.1107/s1600536809010228
Abstract: In the title compound, C16H16N2O3, the benzohydrazide group is not planar and the molecule exists in a trans configuration with respect to the methylidene unit. The dihedral angle between the two substituted benzene rings is 26.9 (2)°. In the crystal structure, the molecular packing is stabilized by intramolecular O—H...N and intermolecular N—H...O hydrogen bonds. The intermolecular hydrogen bonding forms chains parallel to the b axis.
(E)-2-Methoxy-N′-(4-nitrobenzylidene)benzohydrazide
Hong-Yan Ban,Cong-Ming Li
Acta Crystallographica Section E , 2009, DOI: 10.1107/s160053680905079x
Abstract: In the title compound, C15H13N3O4, the molecule exists in a trans configuration with respect to the methylidene unit. The dihedral angle between the two benzene rings is 6.8 (2)°. The C—N—NH—C torsion angle is 3.4 (3)°. The molecule possesses an intramolecular N—H...O hydrogen bond. In the crystal structure, adjacent molecules are linked through intermolecular C—H...O hydrogen bonds, forming dimers
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