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Search Results: 1 - 10 of 413296 matches for " H. C. Liu "
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Analysis for Pull-In Voltage of a Multilayered Micro-Bridge Driven by Electrostatic Force  [PDF]
Y. LIU, G.C. WANG, H.Y. YANG
Engineering (ENG) , 2010, DOI: 10.4236/eng.2010.21007
Abstract: A trial solution for bending deflection of a multilayered micro-bridge subject to a voltage induced load is presented. The relation between the applied voltage and the displacements of the micro-bridge in the pull-in state is analyzed by energy method. Furthermore, two analytical expressions about normalized displacement and pull-in voltage are carried out. It’s proved that the value of normalized displacement is not influenced by residual stress if axial and shear deformation is ignored. Finally, the theoretical results are compared with that of FEM, and they show good agreement.
Theoretic and Numerical Study of a New Chaotic System  [PDF]
C.X. Zhu, Y.H. Liu, Y. Guo
Intelligent Information Management (IIM) , 2010, DOI: 10.4236/iim.2010.22013
Abstract: This paper introduced a new three-dimensional continuous quadratic autonomous chaotic system, modified from the Lorenz system, in which each equation contains a single quadratic cross-product term, which is different from the Lorenz system and other existing systems. Basic properties of the new system are analyzed by means of Lyapunov exponent spectrum, Poincaré mapping, fractal dimension, power spectrum and chaotic behaviors. Furthermore, the forming mechanism of its compound structure obtained by merging together two simple attractors after performing one mirror operation has been investigated by detailed nu-merical as well as theoretical analysis. Analysis results show that this system has complex dynamics with some interesting characteristics.
Factors involved in memory encoding and their implications for the memory performance of older adults and people with mild cognitive impairment  [PDF]
Michael C. C. Kuo, Karen P. Y. Liu, Chetwyn C. H. Chan
World Journal of Neuroscience (WJNS) , 2012, DOI: 10.4236/wjns.2012.22015
Abstract: Rehabilitation of episodic memory declines typically focuses on alleviating the demand for recall and improving the retrieval process. Modulating the encoding is not commonly practiced, but may nevertheless be important. Seventeen event-related potential (ERP) studies interpreted using the subsequent memory effect, an index of successful encoding, are reviewed and the factors involved in encoding are discussed. The nature of the materials used for testing, modes of encoding, and the nature of the retrieval task are highlighted as important factors. Meaningful materials and processing information semantically enhance encoding to episodic memory. The stud-ies reviewed reveal that older persons process information more uniformly without elaboration compared with their younger counterparts. Although people with mild cognitive impairment have encoding and retrieval deficits, an elaborative type of encoding training that draws on successful encoding factors may help to improve memory performance.
Influences of organic manure addition on the maturity and quality of pineapple fruits ripened in winter
Liu*,C.H.; Liu,Y;
Journal of soil science and plant nutrition , 2012, DOI: 10.4067/S0718-95162012000200002
Abstract: a field experiment was conducted to investigate the influence of the addition of organic manure on the maturity stage and quality of pineapple fruits ripened in winter. fertilization was performed with 200 ml peanut-press pulp liquid fertilizer + 20 g compound fertilizer per plant (t1) or 100 ml peanut press pulp liquid fertilizer + 20 g compound fertilizer per plant (t2). fertilization with 20 g compound fertilizer per plant (t0) was used as the control. the results indicated that organic fertilizer addition promoted maturity. the weight per fruit was increased, and the contents of tss and total sugars were enhanced, whereas the titratable acid contents were decreased. a sensory evaluation indicated that, after the addition of organic manure, the pineapple fruits were sweeter and more fragrant. more types of ester aroma components having a higher total relative content were identified in t1, and more types of alkenes having a higher total relative content were identified in t2. the relative contents of propanoic acid, 3-(methylthio)-, and methyl ester were increased by organic manure treatments, with the highest being noted in t1 (5.79%), followed by t2 (5.59%), and the lowest was documented in t0 (4.36%).
Influences of organic manure addition on the maturity and quality of pineapple fruits ripened in winter
C.H. Liu*,Y Liu
Journal of Soil Science and Plant Nutrition , 2012,
Abstract: A field experiment was conducted to investigate the influence of the addition of organic manure on the maturity stage and quality of pineapple fruits ripened in winter. Fertilization was performed with 200 mL peanut-press pulp liquid fertilizer + 20 g compound fertilizer per plant (T1) or 100 mL peanut press pulp liquid fertilizer + 20 g compound fertilizer per plant (T2). Fertilization with 20 g compound fertilizer per plant (T0) was used as the control. The results indicated that organic fertilizer addition promoted maturity. The weight per fruit was increased, and the contents of TSS and total sugars were enhanced, whereas the titratable acid contents were decreased. A sensory evaluation indicated that, after the addition of organic manure, the pineapple fruits were sweeter and more fragrant. More types of ester aroma components having a higher total relative content were identified in T1, and more types of alkenes having a higher total relative content were identified in T2. The relative contents of propanoic acid, 3-(methylthio)-, and methyl ester were increased by organic manure treatments, with the highest being noted in T1 (5.79%), followed by T2 (5.59%), and the lowest was documented in T0 (4.36%).
A simple and universal setup of quasi-monocolor gamma-ray source
H. Lin,C. P. Liu,C. Wang
Physics , 2015,
Abstract: Strict classic 3-D dynamics theory reveals that arbitrarily high center frequency light source can be achieved by flexible application of not-too-strong static electric field and static magnetic field. The magnitudes of the fields are not required to be high.
Vortices in a rotating Bose-Einstein condensate under extreme elongation in a harmonic plus quartic trap
C. C. Huang,C. H. Liu,W. C. Wu
Physics , 2012, DOI: 10.1103/PhysRevA.81.043605
Abstract: The behaviors of a rapid rotating Bose-Einstein condensate under extreme elongation in a 2D anisotropic harmonic plus quartic trap are investigated. Due to the quartic trap, the system remains stable at high rotating velocity, $\Omega\geq \omega_\perp$ ($\omega_\perp$ is the radial harmonic trap frequency), and vortex lattices form even in the absence of the repulsive s-wave interaction ($g$). When $g$ is present, the interplay between $g$ and the quartic trap potential can lead to rich vortex lattice transition states as a function of $\Omega$, to which vortex lattices vanish eventually at some higher $\Omega$.
Li non-stoichiometry and crystal growth of untwinned 1D quantum spin system Lix Cu2 O2
H. C. Hsu,H. L. Liu,F. C. Chou
Physics , 2008, DOI: 10.1103/PhysRevB.78.212401
Abstract: Floating-zone growth of untwinned single crystal of Li_xCu_2O_2 with high Li content of x ~ 0.99 is reported. Li content of Li_xCu_2O_2 has been determined accurately through combined iodometric titration and thermogravimetric methods, which also ruled out the speculation of chemical disorder between Li and Cu ions. The morphology and physical properties of single crystals obtained from slowing-cooling (SL) and floating-zone (FZ) methods are compared. The floating-zone growth under Ar/O_2=7:1 gas mixture at 0.64 MPa produces large area of untwinned crystal with highest Li content, which has the lowest helimagnetic ordering temperature ~19K in the Li_xCu_2O_2 system.
The Diffusion of Tc-99 in Beishan Granite-Temperature Effect  [PDF]
C. Li, Z. Zheng, X. Y. Liu, T. Chen, W. Y. Tian, L. H. Wang, C. L. Wang, C. L. Liu
World Journal of Nuclear Science and Technology (WJNST) , 2013, DOI: 10.4236/wjnst.2013.31006
Abstract:

In the safety assessment of a potential site for high-level radioactive wastes (HLW) disposal, the investigation on the geochemical behaviors of key radionuclides with the possibility for releasing from the potential repository is an important aspect. Due to the high mobility of technetium under most repository conditions, lots of research works were performed to investigate the diffusion of technetium in different potential rocks. In spite of these studies, there remains a lack of data addressing temperature effects. In this paper, the diffusion of 99Tc in Beishan granite at temperatures from 25℃ to 55℃ was studied with laboratory small scale diffusion devices. The experimental data were fitted with a finite difference scheme to get the effective diffusion coefficient (De) of . The results indicated that the relationship of De with temperatures could be described as the modified Stokes-Einstein equation, and the formation factor of Beishan granite was constant in the temperature range of 25℃ - 55℃ with the value of (3.91 ± 1.77) × 10-4.

Research on DC Fault of Multi-Terminal Direct Current System  [PDF]
S. Y. Fan, J. Liu, E. M. Bian, H. T. Xu, C. L. Kang
Energy and Power Engineering (EPE) , 2017, DOI: 10.4236/epe.2017.94B081
Abstract:
This paper introduces the characteristics of VSC and MMC-MTDC and discusses the effects of different kinds of faults in HVDC systems. Special attention is given to the comparison between a pole-to-pole fault and a pole-to-ground fault occurring in the middle of the line or at the terminal of a VSC. Simulations using MATLAB are provided in this article which show the difference effects clearly when faults occur in a VSC-MTDC system or in a MMC-MTDC system. Understanding of such fault characteristics and the influence of the control system on them are important prerequisites on the way to MTDC systems.
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