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Search Results: 1 - 10 of 104312 matches for " Xiaoyang Zhang "
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Study on the Pension Rights of Families That Have Lost Their Only Child  [PDF]
Xiaoyang Zhang
Beijing Law Review (BLR) , 2015, DOI: 10.4236/blr.2015.61003
Abstract: According to incomplete statistics, the number of families that have lost their only child had reached more than one million in China currently, following an annual increase by 76,000. The problem of elder care of these families that have lost their only child has become a hot issue in China. Legislation and relevant policies about families that have lost their only child are not sufficient, which have caused the lack of basis on establishing a reasonable elder care system of those families. This paper is aiming to address the rights as a core and further supplement on the basis of the present situation of families that have lost their only child, therefore implement to build the pension right system of loss of only child families. Meanwhile, we also strive to put forward specific advices on establishing legislation and relevant policies.
Neuropeptide Y receptors in a protozoaStylonychia mytilus
Xiaoyang He,Xiaoyun Zhang,Yunhong Zhen
Chinese Science Bulletin , 1998, DOI: 10.1007/BF02883818
Abstract: Radio ligand binding assays(RLBA) were used to study neuropeptide Y (NPY) receptors in a protozoaStylonychia mytilus. The experimental results showed that 2–3 × 103/mLStylonychia cells incubated in Pringsheim solution which contained3H-NPY could specifically bind3H-NPY and concoraitantly present saturable characteristic. This suggested thatStylonychia possessed some specific binding sites for NPY. Scatchard transformations of binding assay for the NPY receptors at 25°C are compatible with the specific activity of 42. 47 fmol/103 cells and the binding equilibrium constant of 0. 113 nmol/L. The data of125I-NPY binding assay to the membrane protein extract ofStylonychia indicated that there was a significant difference between the amount of total bound and nonspecific bound of125I-NPY. This result indicated that NPY receptors were probably localized mainly on the cell membrane.
Neuropeptide Y receptors in a protozoa Stylonychia mytilus

Xiaoyang He,Xiaoyun Zhang,Yunhong Zhen,

科学通报(英文版) , 1998,
Abstract: Radio ligand binding assays(RLBA) were used to study neuropeptide Y (NPY) receptors in a protozoaStylonychia mytilus. The experimental results showed that 2–3 × 103/mLStylonychia cells incubated in Pringsheim solution which contained3H-NPY could specifically bind3H-NPY and concoraitantly present saturable characteristic. This suggested thatStylonychia possessed some specific binding sites for NPY. Scatchard transformations of binding assay for the NPY receptors at 25°C are compatible with the specific activity of 42. 47 fmol/103 cells and the binding equilibrium constant of 0. 113 nmol/L. The data of125I-NPY binding assay to the membrane protein extract ofStylonychia indicated that there was a significant difference between the amount of total bound and nonspecific bound of125I-NPY. This result indicated that NPY receptors were probably localized mainly on the cell membrane.
Mapping and Quantifying White Mold in Soybean across South Dakota Using Landsat Images  [PDF]
Confiance Mfuka, Xiaoyang Zhang, Emmanuel Byamukama
Journal of Geographic Information System (JGIS) , 2019, DOI: 10.4236/jgis.2019.113020
Abstract: White Mold of soybeans (Glycine Max), also known as Sclerotinia stem rot (Sclerotinia sclerotiorum), is among the most important fungal diseases that affect soybean yield and represents a recurring annual threat to soybean production in South Dakota. Accurate quantification of white mold in soybean would help understand white mold impact on production; however, this remains a challenge due to a lack of appropriate data at a county and state scales. This study used Landsat images in combination with field-based observations to detect and quantify white mold in the northeastern part of South Dakota. The Random Forest (RF) algorithm was used to classify the soybean and the occurrence of white mold from Landsat images. Results show an estimate of 132 km2, 88 km2, and 190 km2 of white mold extent, representing 31%, 22% and 29% of the total soybean area for Marshall, Codington and Day counties, respectively, in 2017. Compared with ground observations, it was found that soybean and white mold in soybean fields were respectively classified with an overall accuracy of 95% and 99%. These results highlight the utility of freely available remotely sensed satellite images such as Landsat 8 images in estimating diseased crop extents, and suggest that further exploration of consistent high spatial resolution images such as Sentinel, and Rapid-Eye during the growing season will provide more details in the quantification of the diseased soybean.
Students’ Journal Paper Citing and Choice of Publisher: The Mediating Roles of Impact Factor and H-Index as Bibliometric Measures  [PDF]
Abdul Razak Ahmed, Xiaoyang Zhang, Shi Yu
Open Access Library Journal (OALib Journal) , 2019, DOI: 10.4236/oalib.1105696
Abstract:
The purpose of this study was to investigate the relationship between journal citation preference (JCP) of scholars and their choice for publisher (CP) for their research papers. The study also considers the mediating roles played by journal impact factor (IF) and H-index (HI) on this relationship. Multiples linear regression analysis and the PROCESS Macro statistical tool were used to assess the main effects and mediating effects between the studied variables. From findings, CP had a 49.1%, 66.7% and 53.0% chance of its variations being explained by a unit increase in JCP, IF and HI respectively. In practical sense, the decision of a research student for a journal paper publisher is explained by the type of journal papers cited in the study up to about 50.0%, ceteris paribus. Impact factor (IF) played a significant mediating role on the relationship between JCP and CP with an r2 of 0.588 against a 0.434 direct effect. Fir HI, an r2 of 0.086 against a direct effect coefficient of 0.434 did not show significant mediation. It implies therefore that CP is influenced mostly by IF of journals.
Molecular mechanism of effect of rotating constant magnetic field on organisms
Xiaoyun Zhang,Zhenguo Luo,Xiaoyang He,Qingguo Han,Weide Zhang
Science China Life Sciences , 2001, DOI: 10.1007/BF02882398
Abstract: The effect of RCMF-magnetic therapy apparatus on signal substances was studied. The radioimmunoassay (RIA) suggested that the magnetic field increased β-endorphin markedly in plasma. ELISA indicated that the magnetic field inhibited vomiting reaction induced by chemotherapy drug, with reversible decrease of serotonin (5-HT) level in brains, small intestine tissue and serum. Furthermore, the bioeffect of magnetic fields on 5-HT level presented a typical window effect and post-effect, and the inhibitory effect of magnetic field on the emesis was parallel to the decrease level of 5-HT. This result implied that the decrease of 5-HT might be the basis of rotating constant magnetic field (RCMF) inhibiting drug-induced emesis. The nitric acid reductase-spectrophotometry and nicotinamide adenine dinucleotide-diaphorase/arginine-vasopressin (AVP) cytochemistry technique showed that the magnetic field induced nitric oxide (NO) increase in hypothalamus and the high NO(A) level lasted for 3 hours. The results suggested that NO(A) increases after the treatment of the magnetic field in hypothalamus, which may result from strong expression of NO-ergic neuron in paraventricular hypothalamic nucleus (PVN), periventricular hypothalamic nucleus (PEN) and supraoptic nucleus (SON). The coexistence of NO and AVP may play an important role in the regulation of endocrine and neuroendocrine by the magnetic field. And our data also confirmed that the magnetic field increased the content of NO so strongly that high NO level lasted for 3 hours, also made neuropeptide Y (NPY) cell in medulla stained heavily.
Molecular Dynamics Simulations of DOPC Lipid Bilayers: The Effect of Lennard-Jones Parameters of Hydrocarbon Chains  [PDF]
Anping Liu, Xiaoyang Qi
Computational Molecular Bioscience (CMB) , 2012, DOI: 10.4236/cmb.2012.23007
Abstract: The current Chemistry at Harvard Molecular Mechanics (CHARMM) force field cannot accurately describe the properties of unsaturated phospholipid membranes. In this paper, a series of simulations was performed in which the Lennard- Jones (L-J) parameters of lipid acyl chains of dioleoylphosphatidylcholine (DOPC) were systematically adjusted. The results showed that adjustment of the L-J parameters in lipid acyl chains can significantly improve the current CHARMM force field. It was found that the L-J parameters have different influences on the order parameters of the top half and bottom half of the chain, separated by the cis double bond. The order parameters of the top half and the bottom half of the chain are related to the area/lipid and the length of the chain, respectively.
Power Balance of Multi-Harmonic Components in Nonlinear Network  [PDF]
Binghua Huang, Xiaoyang He
Journal of Modern Physics (JMP) , 2014, DOI: 10.4236/jmp.2014.514132
Abstract:

The main harmonic components in nonlinear differential equations can be solved by using the harmonic balance principle. The nonlinear coupling relation among various harmonics can be found by balance theorem of frequency domain. The superhet receiver circuits which are described by nonlinear differential equation of comprising even degree terms include three main harmonic components: the difference frequency and two signal frequencies. Based on the nonlinear coupling relation, taking superhet circuit as an example, this paper demonstrates that the every one of three main harmonics in networks must individually observe conservation of complex power. The power of difference frequency is from variable-frequency device. And total dissipative power of each harmonic is equal to zero. These conclusions can also be verified by the traditional harmonic analysis. The oscillation solutions which consist of the mixture of three main harmonics possess very long oscillation period, the spectral distribution are very tight, similar to evolution from doubling period leading to chaos. It can be illustrated that the chaos is sufficient or infinite extension of the oscillation period. In fact, the oscillation solutions plotted by numerical simulation all are certainly a periodic function of discrete spectrum. When phase portrait plotted hasn’t finished one cycle, it is shown as aperiodic chaos.

Discontinuous Legendre Wavelet Galerkin Method for One-Dimensional Advection-Diffusion Equation  [PDF]
Xiaoyang Zheng, Zhengyuan Wei
Applied Mathematics (AM) , 2015, DOI: 10.4236/am.2015.69141
Abstract: This paper presents discontinuous Legendre wavelet Galerkin (DLWG) approach for solving one-dimensional advection-diffusion equation (ADE). Variational formulation of this type equation and corresponding numerical fluxes are devised by utilizing the advantages of both the Legendre wavelet bases and discontinuous Galerkin (DG) method. The distinctive features of the proposed method are its simple applicability for a variety of boundary conditions and able to effectively approximate the solution of PDEs with less storage space and execution. The results of a numerical experiment are provided to verify the efficiency of the designed new technique.
Estimates of Approximation Error by Legendre Wavelet  [PDF]
Xiaoyang Zheng, Zhengyuan Wei
Applied Mathematics (AM) , 2016, DOI: 10.4236/am.2016.77063
Abstract: This paper first introduces Legendre wavelet bases and derives their rich properties. Then these properties are applied to estimation of approximation error upper bounded in spaces \"\"?and \"\"?by norms \"\"?and \"\"?, respectively. These estimate results are valuable to solve integral-differential equations by Legendre wavelet method.
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