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766 results on '"Li, Guang-Ming"'

208. A chaotic signal reconstruction algorithm in wireless sensor networks

Author

Jin Jian-xiu, Huang Jin-Wang, Feng Jiu-Chao, and Li Guang-Ming

Subjects
Computer science, Signal reconstruction, Real-time computing, ComputingMethodologies_IMAGEPROCESSINGANDCOMPUTERVISION, Chaotic, General Physics and Astronomy, Wireless sensor network
Abstract

A chaotic signal in an observation area of network nodes is sent to a fusion center for reconstruction. As the communication bandwidth is limited, the signal must be quantified before sending to the fusion center, which will add quantization noise to the observed signal, which makes the signal reconstruction more difficult. A chaotic signal reconstruction algorithm is proposed in this paper based on square-root cubature Kalman filter. Firstly the probability density function of the observed signal is estimated, and then the optimal quantizer is used to quantify the observed signal. Under the limited budget of quantization bits, the best performance can be achieved. Compared with the unscented Kalman filter counterpart, our algorithm has fewer cubature points and has the merit of small computation load; meanwhile, it uses the square root of error variance for iteration, this will be more stable and accurate when iterating for parameter estimation. Simulation results show that the algorithm can reconstruct the observed signal quickly and effectively, with consuming less computation time and being more accurate than the one based on unscented Kalman filter.

Published
2014

209. (Acetone-2κO){μ-6,6′-dimeth­oxy-2,2′-[propane-1,2-diylbis(nitrilo­methyl­idyne)]diphenolato-κ81:2O 6,O 1,O 1′,O 6′:O 1,N,N′,O 1′}tris­(nitrato-1κ2 O,O′)copper(II)samarium(III)

Author

Sun, Wen-Bin, Yan, Peng-Fei, Li, Hong-Feng, Gao, Ting, and Li, Guang-Ming

Subjects
Metal-Organic Papers
Abstract

In the title heteronuclear complex, [CuSm(C(19)H(20)N(2)O(4))(NO(3))(3)(CH(3)COCH(3))], the Cu(II) ion is five-coordinated by two O and two N atoms from the 6,6'-dimeth-oxy-2,2'-[propane-1,2-diylbis(nitrilo-methyl-idyne)]diphenolate ligand (L) and by an O atom from the acetone mol-ecule in a square-pyramidal geometry. The Sm(III) ion is ten-coordinated by six O atoms from the three nitrate ligands and four O atoms from the L ligand. In L, the C atoms of the diamino-propane fragment are disordered over two positions in a 0.674 (10):0.326 (10) ratio.

Published
2009

210. (Acetone-2κO){μ-6,6′-dimeth­oxy-2,2′-[propane-1,2-diylbis(nitrilo­methyl­idyne)]diphenolato-κ81:2O 6,O 1,O 1′,O 6′:O 1,N,N′,O 1′}tris(nitrato-1κ2 O,O′)copper(II)terbium(III)

Author

Sun, Wen-Bin, Yan, Peng-Fei, Li, Guang-Ming, and Hou, Guang-Feng

Subjects
Metal-Organic Papers
Abstract

In the title heteronuclear complex, [CuTb(C(19)H(20)N(2)O(4))(NO(3))(3)(CH(3)COCH(3))], the Cu(II) ion is five-coordinated by two O and two N atoms from the 6,6'-dimeth-oxy-2,2'-[propane-1,2-diylbis(nitrilo-methyl-idyne)]diphenolate ligand (L) and an O atom from the acetone mol-ecule in a square-pyramidal geometry. The Tb(III) ion is ten-coordinated by six O atoms from three chelating nitrate ligands and four O atoms from the L ligand. In L, the CH(2)-CH-CH(3) fragment is disordered over two conformations, with refined occupancies of 0.725 (11) and 0.275 (11).

Published
2009

211. 中国纺织服装业面临的问题及其解决措施 = The problems and their solutions of China's textile and clothing industries

Author

李光明 Li, Guang Ming, Nanyang Business School, and Gwo - Jiun Mike Leu

Subjects
Social sciences::Economic development::China [DRNTU]
Abstract

中国的纺织和服装行业已经历了其历史上两个繁荣和突发周期。两人的周期造成的市场力量。从来没有在中国有效的市场。随着社会主义市场经济的主导地位在中国的建立，市场成为企业生存的重要因素。中国的纺织和服装企业已经陷入了，因为在计划经济这使他们无法适应这些变化形成的问题，困难的境地。本文的目的是要找到中国的纺织品和服装行业的实际解决办。 China's textile and clothing industries have experienced two cycles of booming and burst in its history. Both of the cycles were caused by market forces. There has never been an effective market in China. Following the establishment of dominant position of socialist market economy in China, market becomes the major factor of enterprises' survival. China's textile and clothing enterprises have been fallen into a difficult position because of the problems formed in the planned economy which made them not adaptable to these changes. The purpose of this article is to find practical solutions for China's textile and clothing industries. ​Master of Science (Managerial Economics)

Published
1999

220. Petrogenesis of Cretaceous igneous rocks from the Duolong porphyry Cu-Au deposit, central Tibet: evidence from zircon U-Pb geochronology, petrochemistry and Sr-Nd-Pb-Hf isotope characteristics.

Author

Li, Jin‐Xiang, Qin, Ke‐Zhang, Li, Guang‐Ming, Xiao, Bo, Zhao, Jun‐Xing, and Chen, Lei

Subjects
PETROGENESIS, IGNEOUS rocks, CRETACEOUS stratigraphic geology, GEOLOGICAL time scales, GEOCHEMISTRY, MINES & mineral resources
Abstract

The Duolong porphyry Cu-Au deposit (5.4 Mt at 0.72% Cu, 41 t at 0.23 g/t Au) was recently discovered in the southern Qiangtang terrane, central Tibet. Here, new whole-rock elemental and Sr-Nd-Pb isotope and zircon Hf isotopic data of syn- and post-ore volcanic rocks and barren and ore-bearing granodiorite porphyries are presented for a reconstruction of magmas associated with Cu-Au mineralization. LA-ICP-MS zircon U-Pb dating yields mean ages of 117.0 ± 2.0 and 120.9 ± 1.7 Ma for ore-bearing granodiorite porphyry and 105.2 ± 1.3 Ma for post-ore basaltic andesite. All the samples show high-K calc-alkaline compositions, with enrichment of light rare earth elements (LREE) and large ion lithophile elements (LILE: Cs and Rb) and depletion of high field strength elements (HFSE: Nb and Ti), consistent with the geochemical characteristics of arc-type magmas. Syn- and post-ore volcanic rocks show initial Sr ratios of 0.7045-0.7055, εNd(t) values of −0.8 to 3.6, (206Pb/204Pb)t ratios of 18.408-18.642, (207Pb/204Pb)t of 15.584-15.672 and positive zircon εHf(t) values of 1.3-10.5, likely suggesting they dominantly were derived from metasomatized mantle wedge and contaminated by southern Qiangtang crust. Compared to mafic volcanic rocks, barren and ore-bearing granodiorite porphyries have relatively high initial Sr isotopic ratios (0.7054-0.7072), low εNd(t) values (−1.7 to −4.0), similar Pb and enriched zircon Hf isotopic compositions [εHf(t) of 1.5-9.7], possibly suggesting more contribution from southern Qiangtang crust. Duolong volcanic rocks and granodiorite porphyries likely formed in a continental arc setting during northward subduction of the Bangong-Nujiang ocean and evolved at the base of the lower crust by MASH (melting, assimilation, storage and homogenization) processes. Copyright © 2014 John Wiley & Sons, Ltd. [ABSTRACT FROM AUTHOR]

Published
2016
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221. 2D l-Di-toluoyl-tartaric acid Lanthanide Coordination Polymers: Toward Single-component White-Light and NIR Luminescent Materials.

Author

Niu, Wan ‐ Ying, Sun, Jing ‐ Wen, Yan, Peng ‐ Fei, Li, Yu ‐ Xin, An, Guang ‐ Hui, and Li, Guang ‐ Ming

Subjects
COORDINATION polymers, TARTARIC acid, LUMINESCENCE, X-ray crystallography, CARBOXYLATES
Abstract

A series of five l-di- p-toluoyl-tartaric acid ( l-DTTA) lanthanide coordination polymers, namely {[Ln4K4 L6(H2O)x]⋅yH2O}n, [Ln=Dy ( 1), x=24, y=12; Ln=Ho ( 2), x=23, y=12; Ln=Er ( 3), x=24, y=12; Ln=Yb ( 4), x=24, y=11; Ln=Lu ( 5), x=24, y=12] have been isolated by simple reactions of H2L (H2L= L-DTTA) with LnCl3⋅6 H2O at ambient temperature. X-ray crystallographic analysis reveals that complexes 1- 5 feature two-dimensional (2D) network structures in which the Ln3+ ions are bridged by carboxylate groups of ligands in two unique coordinated modes. Luminescent spectra demonstrate that complex 1 realizes single-component white-light emission, while complexes 2- 4 exhibit a characteristic near-infrared (NIR) luminescence in the solid state at room temperature. [ABSTRACT FROM AUTHOR]

Published
2016
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222. Synthesis, structure, and tunable white light emission of heteronuclear Zn2Ln2 arrays using a zinc complex as ligand.

Author

Jia, Rui, Li, Hong-Feng, Chen, Peng, Gao, Ting, Sun, Wen-Bin, Li, Guang-Ming, and Yan, Peng-Fei

Subjects
ZINC compounds synthesis, METAL complexes, ENERGY transfer, SINGLE crystals, X-ray crystallography
Abstract

New heteronuclear Zn2Ln2 clusters [Zn2L2Ln2(hfac)6] (Ln = Eu (1), Tb (2) and Dy (3)) have been synthesized based on a flexible Schiff base (H2L = N,N′-bis(salicylidene)-3,6-dioxa-1,8-diaminooctane) and β-diketonate ligand (hfac = hexafluoroacetylacetonate). The structures of the isomorphous complexes 1–3 were determined by single-crystal X-ray crystallography. Photophysical studies indicate that the short intramolecular distance of Zn…Ln allows energy transfer from the Zn2L2-based sensitizers to the Eu(iii) and Tb(iii) centres; the lanthanide luminescence is indeed “lighted up” by the excitation of the zinc complex. More interestingly, white light emission was realized by codoping Eu(iii) ion into the Dy(iii) complex for the first time. [ABSTRACT FROM AUTHOR]

Published
2016
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