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Search Results: 1 - 10 of 26894 matches for " Donghui Jin "
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Channel Error Estimation Methods Comparison under Different Conditions for Multichannel HRWS SAR Systems  [PDF]
Tingting Jin, Xiaolan Qiu, Donghui Hu, Chibiao Ding
Journal of Computer and Communications (JCC) , 2016, DOI: 10.4236/jcc.2016.43014

Multichannel synthetic aperture radar (SAR) in azimuth can resolve the contradiction between high resolution and wide swath faced with traditional SAR imaging. However, channel errors will degrade the performance of imaging. This paper compares the performances of four channel error estimation algorithms under different clutter distributions and SNR conditions. Further, explanations are given for performance differences of the four algorithms, which provide evidence for method selection in engineering applications.

The Turtleback Diagram for Conditional Probability  [PDF]
Donghui Yan, Gary E. Davis
Open Journal of Statistics (OJS) , 2018, DOI: 10.4236/ojs.2018.84045
Abstract: We elaborate on an alternative representation of conditional probability to the usual tree diagram. We term the representation “turtleback diagram” for its resemblance to the pattern on turtle shells. Adopting the set theoretic view of events and the sample space, the turtleback diagram uses elements from Venn diagrams—set intersection, complement and partition—for conditioning, with the additional notion that the area of a set indicates probability whereas the ratio of areas for conditional probability. Once parts of the diagram are drawn and properly labeled, the calculation of conditional probability involves only simple arithmetic on the area of relevant sets. We discuss turtleback diagrams in relation to other visual representations of conditional probability, and detail several scenarios in which turtleback diagrams prove useful. By the equivalence of recursive space partition and the tree, the turtleback diagram is seen to be equally expressive as the tree diagram for abstract concepts. We also provide empirical data on the use of turtleback diagrams with undergraduate students in elementary statistics or probability courses.
Polymorphisms of the DNA Methyltransferase 1 Associated with Reduced Risks of Helicobacter pylori Infection and Increased Risks of Gastric Atrophy
Jing Jiang, Zhifang Jia, Donghui Cao, Mei-Shan Jin, Fei Kong, Jian Suo, Xueyuan Cao
PLOS ONE , 2012, DOI: 10.1371/journal.pone.0046058
Abstract: Introduction DNA methyltransferase-1(DNMT1) is an important enzyme in determining genomic methylation patterns in mammalian cells. We investigated the associations between SNPs in the DNMT1 gene and risks of developing H. pylori seropositivity, gastric atrophy and gastric cancer in the Chinese population. Methods The study consisted of 447 patients with gastric cancer; 111 patients with gastric atrophy; and 961 healthy controls. Five SNPs, rs10420321, rs16999593, rs8101866, rs8111085 and rs2288349 of the DNMT1 gene were genotyped. Anti-H.pylori IgG was detected by ELISA. Gastric atrophy was screened by the level of serum pepsinogen Ιand II and then confirmed by endoscopy and histopatholgical examinations. Results The age- and sex-adjusted OR of H. pylori seropositivity was 0.67 (95%CI: 0.51–0.87) for rs8111085 TC/CC genotypes, significantly lower than the TT genotype in healthy controls. The adjusted OR of H.pylori seropositivity was 0.68 (95%CI: 0.52–0.89) for rs10420321 AG/GG genotypes. In addition, patients carrying rs2228349 AA genotype have a significantly increased risk for H.pylori seropositivity (OR = 1.67; 95%CI: 1.02–2.75). Further haplotype analyses also showed that the ATTTG and ATCTA are significantly associated with increased risks in H.pylori infection compared to the GTCCG haplotype (OR = 1.38, 95%CI: 1.08–1.77; OR = 1.40, 95% CI: 1.09–1.80). The adjusted ORs of gastric atrophy were 1.66 (95%CI: 1.06–2.61) for rs10420321 GG genotype, and 1.67 (95%CI 1.06–2.63, P = 0.03) for rs8111085 CC genotype, but no association was found between SNPs in the DNMT1 gene and risk of developing gastric cancer. Conclusions Individuals with rs10420321 GG and rs8111085 CC genotype of the DNMT1 gene were associated with reduced risks for H.pylori infection. On the other hand, higher risks of gastric atrophy were found in the carriers with these two genotypes compared to other genotypes. Our results suggested that SNPs of DNMT1 could be used as genotypic markers for predicting genetic susceptibilities to H.pylori infection and risks in gastric atrophy.
On the nodal line of the second eigenfunction of the Laplacian over some concave domains in $\mathbb{R}^2$
Donghui Yang
Mathematics , 2010,
Abstract: In this paper we will prove the nodal line $N$ of the second eigenfunction of the Laplacian over some simply connected concave domain $\Omega$ in $\mathbb{R}^2$ must intersect the boundary $\partial\Omega$ at exactly two points.
A new compact class of open sets under Hausdorff distance and shape optimization
Donghui Yang
Mathematics , 2010,
Abstract: In this paper we obtain a new class of open sets, and we prove the class is compact under the Hausdorff distance, then we prove the existence of solutions of some shape optimization for elliptic equations.
A Rare Case of a Giant Cavernous Lymphangioma of the Chest Wall in a Child  [PDF]
Seydou Togo, Moussa Abdoulaye Ouattara, Ibrahim Boubacar Maiga, Yunping Lu, Donghui Jin, Ibrahim Sangaré, Maiga Abdoul Aziz, Cheik Amed Sekou Touré, Ibrahim Coulibaly, Jaques Saye, Cheik Sadibou, Sékou Koumaré, Sadio Yéna, Djibril Sangaré
Open Journal of Respiratory Diseases (OJRD) , 2016, DOI: 10.4236/ojrd.2016.61001
Abstract: Cavernous lymphangioma of the chest wall is a very rare disease entity, and only a few cases have ever been documented in the literature. Cases of recurrent cavernous lymphangioma after surgical excision of a cystic lymphangioma on the same side of the chest wall are quite uncommon. We report a case of a 10-year-old girl, with a giant cavernous lymphangioma of the left lateral chest wall extending into the axilla, who had undergone surgical excision of a cystic lymphangioma 9 years earlier.

YE Meilong,ZHANG Dongxiao,HENG Donghui,JIN Yi,

软件学报 , 1997,
Abstract: The authors discuss concisely, the process of high level synthesis and the extraction and transformation of control information generated in the said process. The authors also discuss the methodology of linking the result of data flow synthesis and that of control flow synthesis as well as the mapping to technology-dependent ASIC based on Xilinx FPGAs.
Multidimensional Time Series Analysis of Financial Markets Based on the Complex Network Approach  [PDF]
Ying Li, Donghui Yang, Xiaobin Li
Journal of Mathematical Finance (JMF) , 2017, DOI: 10.4236/jmf.2017.73039
Abstract: In this study, a modeling method to analyze multidimensional time series based on complex networks is proposed. The rate of return sequence of the closing price and the trading volume fluctuation sequence of the Shanghai Composite Index, the Shenzhen Component Index, the S & P 500 index, and the Dow Jones Industrial Average are analyzed. The two-dimensional time series is transformed into a complex network. We analyze the spatial distribution characteristics of the network to determine the relationship between volume and price. It is found that the interaction of stock return and volume in China’ stock market is more obvious than that in the American market.
Review of Chinese Oligaphorurini (Collembola, Onychiuridae) with descriptions of two new Palaearctic species
Xin Sun,Donghui Wu
ZooKeys , 2012, DOI: 10.3897/zookeys.192.2959
Abstract: A checklist of Chinese Oligaphorurini is given. Two new Chinese species, Micraphorura changbaiensis sp. n. and Oligaphorura pseudomontana sp. n., are described from Changbai Mountain Range. M. changbaiensis sp. n. has the same dorsal pseudocelli formula and number of papillae in Ant. III sensory organ as M. uralica, but they can be easily distinguished by number of chaetae in Ant. III sensory organ, ventral pseudocelli formula, ventral parapseudocelli formula, number of pseudocelli on subcoxa 1 of legs I–III, dorsal axial chaeta on Abd. V and number of chaetae on tibiotarsi. O. pseudomontana sp. n. is very similar to the species O. montanaan increased number of pseudocelli on body dorsally, well marked base of antenna with 1 pseudocellus and 3 pseudocelli outside, subcoxa 1 of legs I–III with 1 pseudocellus each, dorsally S-chaetae formula as 11/011/22211 from head to Abd. V, S-microchaeta present on Th. II–III, claw without inner teeth and with 1+1 lateral teeth, and unguiculus with basal lamella; but they can be separated easily by the number of pseudocelli on Abd. V and VI terga, parapseudocelli on the body, number of chaetae on Th. I tergum, and number of chaetae on tibiotarsi. A key to Chinese species of Oligaphorurini is provided in the present paper.
Agent-based Intrusion Detection For Network-based Application
Jianping Zeng,Donghui Guo
International Journal of Network Security , 2009,
Abstract: Now days, different kinds of IDS systems are available for serving in the network distributed system, but these systems mainly concentrate on network-based and host-based detection. It is inconvenient to integrate these systems into distributed application servers for application-based intrusion detection. An agent-based IDS that can be smoothly integrated into the applications of enterprise information systems is proposed in this paper and we discuss the system architecture, agent structure, and integration mechanism. Our IDS system consists of three kinds of agents, namely, client agent, server agent and communication agent. This paper also explains how to integrate agents with an access control model for getting better security performance. By introducing standard protocols such as KQML, IDMEF into the design of agent, our agent-based IDS shows how to build more flexible software applications.
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