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Search Results: 1 - 10 of 80920 matches for " Xu Han-Dong "
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New Characteristics of Active Life Expectancy of the Elderly in China  [PDF]
Ping Gao, Han-Dong Li
Advances in Aging Research (AAR) , 2016, DOI: 10.4236/aar.2016.51003
Abstract: Life expectancy of the elderly is a significant problem in China, and it changes not only the health care, but also the pension. This study used tracking data from the Chinese Urban and Rural Elderly Population Survey to calculate the age-specific Active Life Expectancy (ALE) of the Chinese elderly population aged 60 years and over. For analysis, this population was divided into different sub-populations according to gender, census register and region. The main conclusions of our study are as follows: 1) The quality of life for elderly males may be greater than that for elderly females; 2) There were significant differences in Active Life Expectancy (ALE) and Inactive Life Expectancy (ILE) between urban and rural elderly; 3) The differences in ALE between the eastern, central and western regions of China were not significant; and 4) The increased remaining life expectancy of the elderly was mainly attributed to the extended ALE in the lower age group and the expanded ILE in the higher age group. This study expands the knowledge of Chinese elderly’s life expectancy in different health status.
Two-Point Entanglement Near a Quantum Phase Transition
Han-Dong Chen
Mathematics , 2006, DOI: 10.1088/1751-8113/40/33/017
Abstract: In this work, we study the two-point entanglement S(i,j), which measures the entanglement between two separated degrees of freedom (ij) and the rest of system, near a quantum phase transition. Away from the critical point, S(i,j) saturates with a characteristic length scale $\xi_E$, as the distance |i-j| increases. The entanglement length $\xi_E$ agrees with the correlation length. The universality and finite size scaling of entanglement are demonstrated in a class of exactly solvable one dimensional spin model. By connecting the two-point entanglement to correlation functions in the long range limit, we argue that the prediction power of a two-point entanglement is universal as long as the two involved points are separated far enough.
Effects of autophagy on adenanthin-induced death of human hepatocellular carcinoma Bel-7402 cells

XU Yi-Wei
, SUN Han-dong, HUANG Ying

- , 2015, DOI: 11.3969/j.issn.1674-8115.2015.08.008
Abstract: 目的 探讨细胞自噬在腺花素诱导的人肝细胞癌(HCC)Bel-7402细胞死亡中的作用。方法 以9 μmol/L的腺花素处理Bel-7402细胞0、0.5、1、2、4、6、8、12、24 h,Western blotting检测自噬相关蛋白Beclin-1和LC3的蛋白表达。采用免疫荧光方法检测9 μmol/L 腺花素处理0、2、4 h的Bel-7402细胞中内源性LC3蛋白的表达分布情况。通过建立特异性干预Beclin-1基因表达的细胞系,利用Western blotting分析及光学显微镜观察Beclin-1低表达对腺花素诱导的自噬活性改变以及细胞生长抑制和死亡的影响。利用CCK-8方法检测野生型和ATG5缺失(ATG5-/-)小鼠胚胎成纤维细胞(MEFs)对于不同浓度的腺花素诱导的细胞生长抑制效应,通过比较半数抑制浓度(IC50),分析ATG5基因沉默MEFs与野生型MEFs的腺花素敏感性差异。结果 Western blotting和免疫荧光检测结果显示,腺花素显著增强Bel-7402细胞的自噬活性。敲除Beclin-1基因对腺花素诱导的细胞自噬活性增强效应及其引发的细胞死亡过程无明显影响。与野生型MEFs比较,ATG5-/- MEFs对腺花素诱导的细胞生长抑制效应更为抵抗。结论 腺花素能够显著增强Bel-7402细胞的自噬活性,并促进其诱导细胞死亡的发生,但自噬活性的增强并不依赖Beclin-1的表达。
: Objective To investigate the effects of autophagy on adenanthin-induced death of human hepatocellular carcinoma (HCC) Bel-7402 cells. Methods Bel-7402 cells were treated by adenanthin of 9 μmol/L for 0, 0.5, 1, 2, 4, 6, 8, 12, and 24 h. Expressions of autophagy related proteins Beclin-1 and LC3 were detected by Western blotting. The distribution of expression of endogenous LC3 protein in Bel-7402 cells treated by adenanthin of 9 μmol/L for 0, 2, and 4 h was detected by immunofluorescence.The cell line that the expression of Beclin-1 gene was specifically intervened was constructed. The effects of low expression of Beclin-1 on changes of autophagy activity, cell growth, and cell death induced by adenanthin were analyzed and observed by western blotting and light microscopy, respectively. CCK-8 was adopted to detect the effects of wild type and ATG5 knockout (ATG5-/-) mouse embryonic fibroblasts (MEFs) on the inhibition of cell growth induced by adenanthin of different concentrations. The difference of sensitivity to adenanthin between wild type and ATG5 knock out MEFs was analyzed by comparing the IC50. Results Western blotting and immunofluorescence showed that adenanthin significantly increased the autophagy activity of Bel-7402 cells. Knockout of Beclin-1 did not remarkably affect adenanthin-induced autophagy activity and cell death. Compared with wild type MEFs, ATG5-/- MEFs were more resistant to the inhibition of cell growth induced by adenanthin. Conclusion Adenanthin can significantly increase the autophagy activity of Bel-7402 cells and promote adenanthin-induced cell death. But the increase of autophagy activity is independent of the expression of Beclin-1
Two-Dimensional Magnetotelluric Forward Research for the Vertical Anisotropy  [PDF]
Miao-Xin Yang, Han-Dong Tan, Mao Wang, Huan Ma
International Journal of Geosciences (IJG) , 2015, DOI: 10.4236/ijg.2015.610091
Abstract: When we study and process magnetotelluric data, the earth's interior structure is usually equated with isotropic medium in the existing approaches. When the underground structure is complex, there is serious resistivity anisotropy in macroscopic view, and then the traditional processing and interpretation methods often produce wrong results. For that we must establish the study method based on the anisotropy in order to explain the measured data exactly. In this paper, by considering the change of resistivity in three electrical spindle directions, we deduce two-dimensional magnetotelluric variational equation for vertical anisotropy. The study region is divided into many rectangular units, and it is dealt with linear interpolation in each of them. By comparing with former achievements including the results of the isotropic and anisotropic models, it demonstrates the validity of the program. The pseudosection map of vertical anisotropic body shows that we can’t ignore the anisotropy effect and provides a solid foundation for the further inversion study.
Topological Dirac Band Insulators in Three Dimensions and Novel Transport Laws
B. Andrei Bernevig,Han-Dong Chen
Physics , 2006,
Abstract: This paper has been withdrawn.
Majorana Fermions, Exact Mappings between Classical and Topological Orders
Han-Dong Chen,Jiangping Hu
Physics , 2007, DOI: 10.1103/PhysRevB.76.193101
Abstract: Motivated by the duality between site-centered spin and bond-centered spin in one-dimensional system, which connects two different constructions of fermions from the same set of Majorana fermions, we show that two-dimensional models with topological orders can be constructed from certain well-known models with classical orders characterized by symmetry-breaking. Topology-dependent ground state degeneracy, vanishing two-point correlation functions, and unpaired Majorana fermions on boundaries emerge naturally from such construction. The approach opens a new way to construct and characterize topological orders.
Exact results on the Kitaev model on a hexagonal lattice: spin states, string and brane correlators, and anyonic excitations
Han-Dong Chen,Zohar Nussinov
Physics , 2007, DOI: 10.1088/1751-8113/41/7/075001
Abstract: In this work, we illustrate how a Jordan-Wigner transformation combined with symmetry considerations enables a direct solution of Kitaev's model on the honeycomb lattice. We (i) express the p-wave type fermionic ground states of this system in terms of the original spins, (ii) adduce that symmetry alone dictates the existence of string and planar brane type correlators and their composites, (iii) compute the value of such non-local correlators by employing the Jordan-Wigner transformation, (iv) affirm that the spectrum is inconsequential to the existence of topological quantum order and that such information is encoded in the states themselves, and (v) express the anyonic character of the excitations in this system and the local symmetries that it harbors in terms of fermions.
Geometry of the 3-Qubit State, Entanglement and Division Algebras
Bogdan A. Bernevig,Han-Dong Chen
Mathematics , 2003, DOI: 10.1088/0305-4470/36/30/309
Abstract: We present a generalization to 3-qubits of the standard Bloch sphere representation for a single qubit and of the 7-dimensional sphere representation for 2 qubits presented in Mosseri {\it et al.}\cite{Mosseri2001}. The Hilbert space of the 3-qubit system is the 15-dimensional sphere $S^{15}$, which allows for a natural (last) Hopf fibration with $S^8$ as base and $S^7$ as fiber. A striking feature is, as in the case of 1 and 2 qubits, that the map is entanglement sensitive, and the two distinct ways of un-entangling 3 qubits are naturally related to the Hopf map. We define a quantity that measures the degree of entanglement of the 3-qubit state. Conjectures on the possibility to generalize the construction for higher qubit states are also discussed.
A Kind of Enterprise Strategies Decision-making Model for Choosing Advanced Technology to Improve Its Performance

ZHANG Han-dong{,},XU Bao-dong,YANG Wei-han,WANG Ding-wei,

系统工程理论与实践 , 2003,
Abstract: According to the viewpoint of control,evolution and synergy, a kind of enterprise strategies decision-making model is submitted which can be used for the enterprise improvement applying some new appropriate techniques, such as JIT,TQM,ABCS,BPR and PI. The main steps for implementation the strategies decision-making are stressed,and some specifics and key facts of applying these new techniques are proposed too. It provides useful reference model for enterprises to realize scientific strategic decision-making under different practical situations.
Kind of optimal investment strategy for dynamic alliance in the fuzzy sense

ZHANG Han-dong,XU Bao-dong,YANG Wei-han,WANG Ding-wei,

控制理论与应用 , 2003,
Abstract: A kind of effective fuzzy investment decision making model for mutually complementary enterprises in a DA(dynamic alliance) or VE(virtual enterprises) is submitted, which computes total gross profits and coefficients of profits and simultaneously considers enterprises' relativity and investment incentive measure. An algorithm to the practical problem based on fuzzy optimizing technique is then analyzed stress in the fuzzy sense, the method can be used for the DA to obtain the maximum total gross profits from competitive and cooperative integrated market. Some key steps for implementating the decision making scheme are proposed too. Then, some examples illustrate the utility of the suggested method. It provides useful reference model for enterprises in a DA or VE to realize scientific optimal investment decision making strategy.
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