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Search Results: 1 - 10 of 62010 matches for " Xiaoyan Yu "
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Study of Mechanical Model of Sports Ball’S Flight Trajectory and Its Application
Xiaoyan Yu
Research Journal of Applied Sciences, Engineering and Technology , 2013,
Abstract: In order to resolve the controversy of ball games the placement problem fined on the other hand, to promote the teaching and training ball flight trajectory. Tennis is the main object of study, use of literature, mathematical statistics and experimental research methods and to establish an appropriate mathematical model, using MATLAB software to accurately determine the trajectory and impact point of the ball's flight, used in teaching, training and competition in. The conclusions show that the law, accurate data analysis using MATLAB software can simulate the flight of the ball moving on sports development has a very good help provide a new way of thinking for the in-depth study the pattern of winning ball games and similar sports teaching, training and selection of athletes is an important complementary and valuable.
Therapeutic Effect of Three-Dimensional Conformal Radiotherapy Combined with Tegafur Gimeracil and Oteracil Potassium in the Treatment of Locally Advanced Esophageal Cancer  [PDF]
Xiaoyan Yan, Hongsheng Yu
Open Access Library Journal (OALib Journal) , 2019, DOI: 10.4236/oalib.1105303
Abstract:
Objective: To observe the therapeutic effect of three-dimensional conformal radiotherapy combined with Tegafur Gimeracil and Oteracil Potassium in the treatment of locally advanced esophageal cancer. Method: The patients with locally advanced esophageal cancer admitted to our hospital were randomly divided into observation group and control group. The control group was treated with three-dimensional conformal radiotherapy alone; the observation group, three-dimensional conformal radiotherapy combined with tegafur was used. Result: In the observation group, the patient’s disease control rate was 89.74%, and in the control group, the patient’s disease control rate was 71.79%. The results of the two groups were compared and the difference was statistically significant (p < 0.05). In the observation group, the patient’s leukopenia rate was 38.46%, the thrombocytopenia rate was 35.90%, the incidence of nausea and vomiting was 53.85%, and the quality of life was (85.20 ± 1.59) points. There was no significant difference (p > 0.05) compared with the control group. The local recurrence rate of the observation group was 10.26%, and the difference was significant compared with the control group (p < 0.05). Conclusion: The treatment of locally advanced esophageal cancer by three-dimensional conformal radiotherapy combined with Tegafur Gimeracil and Oteracil Potassium treatment can effectively improve the control rate of the disease, and its clinical application value is very significant.
Cloning and Bioinformatics Analysis of Rosa rugosa TFL1 Gene (RrTFL1)  [PDF]
Dandan Zhao, Xiao Wei, Leilei Wang, Lanyong Zhao, Xiaoyan Yu
Advances in Bioscience and Biotechnology (ABB) , 2017, DOI: 10.4236/abb.2017.86014
Abstract: In order to determine if the TFL1 is related with the continuous flowering phenotype of wild Rosa rugosa from Muping, the full-length cDNA sequence of TFL1 Gene was cloned for the first time from the flower buds of wild Rosa rugosafrom Muping with RT-PCR and RACE methods and named as RrTFL1. The full-length cDNA is 973 bp with an open reading frame of 519 bp, encoding 172 amino acids. The derived protein has a molecular weight of 19.48 kD, a calculated pI of 9.13, a c100227 conserved domain at position 1-172, and belongs to PEBP family. The derived protein is a Hydrophilic protein secreted into the cytoplasmic. There is no transmembrane domain and no signal peptide cleavage site, five Ser phosphorylation sites, seven Thr phosphorylation sites, three Tyr phosphorylation sites, one O-glycosylation site, and no N-glycosylation sites. There are 24.42% α-helixes, 36.63% random coil, 27.91% extended peptide chain, and 11.05% β-corner structure. This protein and the TFL1 protein from Rosaceae plants, including Rosa chinensis, share a sequence homology of 87% - 96%. All of the proteins contain a c100227 conserved domain, two highly conserved modules D-P-D-x-P, G-x-H-R, and two functional sites His, Asp. Furthermore, their phylogenetic relationships are consistent with their traditional classifications. These results not only laid a foundation for further researching the expression and function of RrTFL1, but also cultivating new varieties of R. rugosawhich can flower continuously by gene engineering.
Hyperspectral Inversion of Potassium Content in Apple Leaves Based on Vegetation Index  [PDF]
Xiaoyan Guo, Xicun Zhu, Cheng Li, Yu Wei, Xinyang Yu, Gengxing Zhao, Houxing Sun
Agricultural Sciences (AS) , 2017, DOI: 10.4236/as.2017.88061
Abstract:
The aim of this study is to establish the estimation model of potassium content in apple leaves by using vegetation index. A total of 96 fresh apple leaves were collected from 24 orchards in Qixia County, Shandong Province. The spectral reflectance of the leaves was measured by ASD FieldSpec4. The difference vegetation index (DVI), ratio vegetation index (RVI) and normalized vegetation index (NDVI) were used to make the contour map through Matlab platform, and the combination of high correlation wavelength was selected to establish the random forest (RF) regression model of potassium content. The hyperspectral reflectance increased with the increase of leaf potassium content. The correlation between DVI and the content of potassium is higher than NDVI and RVI. The optimal vegetation index was DVI (364,740), the correlation coefficient was 0.5355. The random forest regression model established with DVI selected vegetation index was the best. R2 was 0.8995, RMSE and RE% were 0.0791 and 0.0617 respectively. Using DVI to establish the random forest regression model to reverse the potassium content of apple leaves has achieved good results. It is important to determine the growth status of apple in hyperspectral and to determine the potash fertilizer of apple trees.
Estimating Total Nitrogen Content in Brown Soil of Orchard Based on Hyperspectrum  [PDF]
Shujing Cao, Xicun Zhu, Cheng Li, Yu Wei, Xiaoyan Guo, Xinyang Yu, Chunyan Chang
Open Journal of Soil Science (OJSS) , 2017, DOI: 10.4236/ojss.2017.79015
Abstract: The best hyperspectral estimation model of soil total nitrogen (TN) was established, which provided the basis for rapid and accurate estimation of soil total nitrogen content, scientific and rational fertilization and soil informatization management. A total of 92 brown soil samples were collected from the orchard of Qixia County, Yantai City, Shandong Province. After drying and grinding, the hyperspectrum of the soil was measured in the laboratory using ASD FieldSpec3. The TN contents of brown soil were measured by Kjeldahl method. The sensitive wavelengths were selected by multiple linear stepwise regression method. The hyperspectral estimation model of TN was established by Random Forest (RF) and Support Vector Machines (SVM). The models were validated by independent samples. The best estimation model was obtained. The sensitive wavelengths were 956 nm, 995 nm, 1020 nm, 1410 nm, 1659 nm and 2020 nm. The coefficients of determination (R2) of the two estimation models were 0.8011 and 0.8283, the root mean square errors (RMSE) were 0.022 and 0.025, and relative errors (RE) were 0.1422 and 0.1639, respectively. Random Forest model and Support Vector Machines model are feasible in estimating TN contents, but the Support Vector Machines model is better.
Applications of Hyperspectral Remote Sensing in Ground Object Identification and Classification  [PDF]
Yu Wei, Xicun Zhu, Cheng Li, Xiaoyan Guo, Xinyang Yu, Chunyan Chang, Houxing Sun
Advances in Remote Sensing (ARS) , 2017, DOI: 10.4236/ars.2017.63015
Abstract: Hyperspectral remote sensing has become one of the research frontiers in ground object identification and classification. On the basis of reviewing the application of hyperspectral remote sensing in identification and classification of ground objects at home and abroad. The research results of identification and classification of forest tree species, grassland and urban land features were summarized. Then the researches of classification methods were summarized. Finally the prospects of hyperspectral remote sensing in ground object identification and classification were prospected.
Component Analysis of Anthocyanins in Petals at Different Flowering Stages of Three Rosa rugosa Hybrid Cultivars  [PDF]
Mingyuan Zhao, Xiaoming Sui, Yu Wang, Zongda Xu, Xiaoyan Yu, Xu Han
Advances in Bioscience and Biotechnology (ABB) , 2019, DOI: 10.4236/abb.2019.101001
Abstract:

The species and contents of anthocyanins in plant petals can make plants appear pink, red, violet and blue, etc., and play a major role in the coloration of plants. In this study, the species and contents of anthocyanins in the petals of three R. rugosa hybrid cultivars, R. rugosa “Zizhi”, R. rugosa “Fenzizhi” and R. rugosa “Baizizhi”, were analyzed, and the direct cause of the differences in flower color of three R. rugosa hybrid cultivars was inferred. This paper provides a reference for the coloration mechanism and flower color breeding of R. rugosa. The specific methods are as follows: the petals of five flowering stages of three R. rugosa hybrid cultivars were used as materials, and the types and contents of anthocyanins contained in them were qualitatively and quantitatively analyzed by high performance liquid chromatography (HPLC). The same six kinds of anthocyanins were identified in R. rugosa “Zizhi” and R. rugosa “Fenzizhi”, mainly based on the diglycoside of paeoniflorin and cyanidin. The relative contents of the two anthocyanins were higher at budding stage and initial opening stage. In the different flowering stages of R. rugosa “Zizhi”, the content of Pn3G5G was up to 4280.84 ± 20.82 μg·g-1, and the content of Cy3G5G was up to 789.41 ± 1.21 μg

Cyanidophenyltris(trimethylphosphine)cobalt(II)
Fengli Yu,Qibao Wang,Xiaoyan Li
Acta Crystallographica Section E , 2008, DOI: 10.1107/s1600536807064781
Abstract: The title molecule, [Co(C6H5)(CN)(C3H9P)3], lies on a crystallographic mirror plane with the CoII ion coordinated in a distorted square-pyramidal environment with one of the P atoms in the apical position. In the basal plane, the phenyl substituent is trans to the cyanide group with a C—Co—C angle which is significantly distorted from linearity.
Positive Solutions for the Initial Value Problems of Fractional Evolution Equation
Yue Liang,Yu Ma,Xiaoyan Gao
Journal of Function Spaces , 2013, DOI: 10.1155/2013/781404
Abstract: This paper discusses the existence of positive solutions for the initial value problem of fractional evolution equation with noncompact semigroup , ; in a Banach space , where denotes the Caputo fractional derivative of order , is a closed linear operator, generates an equicontinuous semigroup, and is continuous. In the case where satisfies a weaker measure of noncompactness condition and a weaker boundedness condition, the existence results of positive and saturated mild solutions are obtained. Particularly, an existence result without using measure of noncompactness condition is presented in ordered and weakly sequentially complete Banach spaces. These results are very convenient for application. As an example, we study the partial differential equation of parabolic type of fractional order. 1. Introduction The theory of fractional differential equations is a new and important branch of differential equation theory, which has an extensive physical background and realistic mathematical model; see [1–6]. Correspondingly, the existence of solutions to fractional evolution equations in Banach space has also been studied by several authors; see [7–17]. In [7, 8], El-Borai first constructed the type of mild solutions to fractional evolution equations in terms of a probability density. And then they investigated the existence, uniqueness, and regularity of solutions to fractional integrodifferential equations in [9, 10]. Recently, this theory was developed by Zhou et al. [11–14]. In [15–17], the authors studied the existence of mild solutions to fractional impulsive evolutions equations. But as far as we know, there are seldom results on the existence of positive solutions to the fractional evolution equations; see [18–20]. In this paper, we use the Sadovskii’s fixed point theorem and monotone iterative technique to discuss the existence of positive and saturated mild solutions for the initial value problem (IVP) of fractional evolution equations: in Banach space , where denotes the Caputo fractional derivative of order , is a closed linear operator, generates a -semigroup ( ) in , and is continuous and will be specified later, . In some existing articles, the fractional evolution equations were treated under the hypothesis that (I) generates a compact semigroup or (II) the nonlinearity is Lipschitz continuous in on a bounded set. For the case (I), the continuity of nonlinearity can guarantee the local existence of solutions. Hence it is convenient to apply to partial differential equations with compact resolvent. But for the case of noncompact semigroup,
Hyper-Graph Based Database Partitioning for Transactional Workloads
Yu cao,Xiaoyan Guo,Stephen Todd
Computer Science , 2013,
Abstract: A common approach to scaling transactional databases in practice is horizontal partitioning, which increases system scalability, high availability and self-manageability. Usu- ally it is very challenging to choose or design an optimal partitioning scheme for a given workload and database. In this technical report, we propose a fine-grained hyper-graph based database partitioning system for transactional work- loads. The partitioning system takes a database, a workload, a node cluster and partitioning constraints as input and out- puts a lookup-table encoding the final database partitioning decision. The database partitioning problem is modeled as a multi-constraints hyper-graph partitioning problem. By deriving a min-cut of the hyper-graph, our system can min- imize the total number of distributed transactions in the workload, balance the sizes and workload accesses of the partitions and satisfy all the partition constraints imposed. Our system is highly interactive as it allows users to im- pose partition constraints, watch visualized partitioning ef- fects, and provide feedback based on human expertise and indirect domain knowledge for generating better partition- ing schemes.
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