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Search Results: 1 - 10 of 23788 matches for " Xinhua Shi "
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Uniqueness of Meromorphic Functions of Differential Polynomials Sharing Two Values IM  [PDF]
Xinhua Shi
Advances in Pure Mathematics (APM) , 2014, DOI: 10.4236/apm.2014.42005

In this paper, we shall study the uniqueness problems of meromorphic functions of differential polynomials sharing two values IM. Our results improve or generalize many previous results on value sharing of meromorphic functions.

In-Season Side-Dressing of Urea and Ammonium Nitrate to Cotton on No-Till Soils with High Residual Nitrogen and Pre-Plant Nitrogen Application  [PDF]
Xinhua Yin
Open Journal of Soil Science (OJSS) , 2015, DOI: 10.4236/ojss.2015.511026
Abstract: It is essential to develop innovative approaches that can apply N more efficiently. The objective of this study was to examine in-season side-dress urea and ammonium nitrate (UAN) applications to cotton on no-till soils with high residual N fertility. A field trial was conducted near Milan, TN in 2011 and 2012 with strip plots in a RCB design with three replicates. The following six in-season side-dress fluid UAN treatments were compared: 1) zero N; 2) low uniform-rate N application of 56 kg·N·ha-1; 3) high uniform-rate N application of 78.4 kg·N·ha-1; 4) ordinary variable-rate N application algorithm for each sub plot based on the average Normalized Difference Vegetation Index (NDVI) value in that sub plot; 5) reversed variable-rate N application algorithm for each sub plot based on average NDVI of that sub plot; and 6) N application rate based on the average NDVI value in each strip plot. All plots received 26 kg·N·ha-1 as diammonium phosphate before cotton planting each year. Leaf N concentrations were mostly enhanced with all side-dress N applications ranging from 56 to 78 kg·N·ha-1 relative to zero N during early to late bloom although this upland field had high
Small Scale Spatio-Temporal Variabilities in Soil Nitrogen, Leaf Nitrogen, and Canopy Normalized Difference Vegetation Index of Cotton  [PDF]
Xinhua Yin
Journal of Geoscience and Environment Protection (GEP) , 2016, DOI: 10.4236/gep.2016.412005
Abstract: Strip plots have been increasingly used in agricultural field experiments to better reflect the true situation of crop production on farmers’ fields, but failure to account for spatially and temporally related errors when present in the data analysis of strip plot field experiments may cause inefficient assessment of treatment effect significance. The objective of this study was to investigate patterns and degrees of the spatial and temporal variabilities in soil inorganic N level, leaf N concentration, and Normalized Difference Vegetation Index (NDVI) of cotton under no-tillage and the influences of N treatments on these variabilities. A strip plot experiment was conducted on a private farm near Brazil, Gibson County, Tennessee from 2009 through 2011. Five N treatments of 0, 45, 90, 134, and 179 kg N ha-1 were implemented as side dress N in strip plots under a randomized complete block design with three replicates after 45 kg N ha-1 was applied in the form of chicken litter before cotton planting. Spatial variability was present in soil inorganic N before cotton planting and after harvest, and in leaf N and canopy NDVI at the early square and early, mid-, and late bloom stages although the patterns and degrees of the spatial variabilities sometimes varied with growth stages and years. Application of the in-season side-dress N treatments often reduced the spatial variations of leaf N and NDVI, but increased those of post-harvest soil inorganic N. Out results suggest that the spatial and temporal variabilities of soil inorganic N, leaf N, and NDVI are high, and should be taken into account if possible in the data analyses of N treatment effects on related soil properties and plant characteristics of cotton in strip plot field experiment research.
Geostatistical Analyses of Field Spatial Variability of Cotton Yield  [PDF]
Xinhua Yin
Journal of Geoscience and Environment Protection (GEP) , 2016, DOI: 10.4236/gep.2016.412006
Abstract: More information is needed on the spatial variability of soil properties and plant characteristics at the field strip plot experiment scale for accurate evaluation of treatment effect significance. The objective of this study was to examine the pattern and degree of field spatial variability of cotton yield and the relationship between cotton yield and canopy Normalized Difference Vegetation Index (NDVI). A strip plot trial was carried out on a private farm near Brazil, Gibson County, TN from 2009 to 2011. Five side dress N treatments of 0, 45, 90, 134, and 179 kg N ha-1 were imposed on cotton in strip plots under a RCB design with three replications after 45 kg N ha-1 was applied as pre-plant N in the form of chicken litter. Spatial variability was high in lint yield although its pattern and degree varied with year. The correlation of lint yield with NDVI was almost always statistically significant but not strong during early square to late bloom irrespective of year. There was significant global spatial autocorrelation of residual lint yield (N treatment effects on yield excluded) within the test field in 2010 and 2011 based on the Moran’s I statistic. The Localized Indicators of Spatial Autocorrelation (LISA) cluster map showed that there were some significant local clusters of residual lint yield within the field each year. In conclusion, spatial variability needs to be included in data analyses of N treatment effects on cotton yield in strip plot field studies. Cotton yield from farmers’ fields could be expected to have noticeable annual and within field spatial variations in the region, which will significantly influence cotton yields.
A Review of Succession and Innovation in Family Business  [PDF]
Xinhua Yuan
American Journal of Industrial and Business Management (AJIBM) , 2019, DOI: 10.4236/ajibm.2019.94066
Family business is an important part of the national economy and plays an important role in the development of social economy. The iterative process of technology and the new business model make the competition among enterprises increasingly fierce. If enterprises want to succeed in the fierce competition, they must consolidate and develop through innovation. At the same time, the phenomenon of intergenerational succession of Chinese family businesses is becoming more and more common. Recalling the research on intergenerational succession and innovation of family business, the existing research lacks a unified analytical framework, and the research results are scattered, fragmented, and systematic. This has largely restricted the depth of theoretical research in this field. This paper systematically sorts out intergenerational succession and innovation research. It has certain guiding significance for domestic family business succession practice and succession theory research. It will help researchers to better draw on the theoretical results in this field and lay the foundation for follow-up research.
Graphs on Which a Group of Prime Power Order with a Cyclic MaximalSubgroup Acts Edge-Transitively (II)

CHEN Shangdi,SHI Xinhua,

系统科学与数学 , 2008,
Abstract: Let ${\it \Gamma}$ be a finite simple undirected graph with no isolated vertices, $G$ is a subgroup of Aut$({\it \Gamma})$. The graph ${\it \Gamma}$ is said to be $G$-edge transitive if $G$ is transitive on the set of edges of ${\it \Gamma}$. We obtain a complete classification of $G$-edge transitive graphs, when $G$ is a group of prime-power order with a cyclic maximal subgroup. This extends Sander's conclusion. Then ${\it \Gamma}$ is $G$-edge-transitive if and only if ${\it \Gamma}$ is one of following graphs:1)\ $p^mK_{1,p^{n-1-m}}$, $0\leq m\leq n-1$;2)\ $p^mK_{1,p^{n-m}}$, $0\leq m\leq n$;3)\ $p^mK_{p,p^{n-m-1}}$, $0\leq m\leq n-2$;4)\ $p^{n-m}C_{p^m}$, $p^m\geq 3,\ m
Experimental Observation of a Topological Phase in the Maximally Entangled State of a Pair of Qubits
Jiangfeng Du,Jing Zhu,Mingjun Shi,Xinhua Peng,Dieter Suter
Physics , 2007, DOI: 10.1103/PhysRevA.76.042121
Abstract: Quantum mechanical phase factors can be related to dynamical effects or to the geometrical properties of a trajectory in a given space - either parameter space or Hilbert space. Here, we experimentally investigate a quantum mechanical phase factor that reflects the topology of the SO(3) group: since rotations by $\pi$ around antiparallel axes are identical, this space is doubly connected. Using pairs of nuclear spins in a maximally entangled state, we subject one of the spins to a cyclic evolution. If the corresponding trajectory in SO(3) can be smoothly deformed to a point, the quantum state at the end of the trajectory is identical to the initial state. For all other trajectories the quantum state changes sign.
Complete Adiabatic Quantum Search in Unsorted Databases
Nanyang Xu,Xinhua Peng,Mingjun Shi,Jiangfeng Du
Physics , 2008,
Abstract: We propose a new adiabatic algorithm for the unsorted database search problem. This algorithm saves two thirds of qubits than Grover's algorithm in realizations. Meanwhile, we analyze the time complexity of the algorithm by both perturbative method and numerical simulation. The results show it provides a better speedup than the previous adiabatic search algorithm.
Collision Resolution MAC Protocols for Wireless Ad Hoc Networks  [PDF]
Xinhua Yang, Tracy Camp
Communications and Network (CN) , 2013, DOI: 10.4236/cn.2013.51003

In wireless ad hoc networks, nodes cooperatively form a network without any infrastructure such as a BS/AP (base station or access point). The widely-used contention-based MAC protocol, IEEE 802.11b, is inefficient in multi-hop networks due to the hidden and exposed terminal problems. The most popular schedule-based MAC protocol, TDMA (time division multiple access), is difficult to implement in an ad hoc network due to the lack of infrastructure. The contribution of this paper is to provide the community novel and efficient MAC (medium access control) protocols (i.e., a collision resolution protocol) for a wireless ad hoc network without a centralized infrastructure. We propose two new MAC protocols (one distributed algorithm and one cluster-based algorithm) that use a collision resolution scheme for a network with a single BS/AP. We first compare the performance of our distributed algorithm with our cluster-based algorithm. Then, we compare our algorithm that performs better (i.e., our cluster-based algorithm) to TDMA in a two-hop network. The simulation results illustrate that our cluster-based algorithm provides higher throughput and lower delay than TDMA in a two-hop network.

An Oligodeoxynucleotide with Promising Modulation Activity for the Proliferation and Activation of Osteoblast
Zhiyuan Feng,Yuqin Shen,Liying Wang,Lin Cheng,Jing Wang,Quanshun Li,Wei Shi,Xinhua Sun
International Journal of Molecular Sciences , 2011, DOI: 10.3390/ijms12042543
Abstract: The paper explored the regulatory role of oligodeoxynucleotides (ODNs) with specific sequences in the proliferation and activation of osteoblast, using human osteoblast-like cell line MG 63 as the model. Through the administration of ODNs to MG 63 cells at a concentration of 1.0 μg/mL, ODN MT01 with positive effects on proliferation and activation of osteoblast was selected from 11 different ODNs by methyl thiazolyl tetrazolium (MTT) assay and alkaline phosphatase (ALP) activity measurement. To get a?deeper insight into the molecular mechanism, effects of ODN MT01 treatment on the?expression level of Sp7, runx-2, collagen-I, osteoprotegerin (OPG) and RANK ligand?(RANKL) were determined using quantitative real time PCR and Western blotting. Remarkably, the mRNA and protein expression levels of Sp7, runx-2, collagen-I and OPG were improved after ODN MT01 treatment. Meanwhile, the protein expression level of RANKL was dramatically decreased. These results suggested that ODN MT01 had a significant impact in facilitating osteogenic proliferation and activation, and provided a direct evidence for the notion that single strand ODN could regulate the balance of bone formation and resorption, and thus was of great potential in the rebuilding of alveolar bone.
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