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Search Results: 1 - 10 of 104258 matches for " Yinhua Zhang "
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2.9 - 8.4 GHz Filter Bank Using Stub-Loaded Multi-Mode Resonators  [PDF]
Yinhua Yao, Tongxiu Fan
Journal of Electromagnetic Analysis and Applications (JEMAA) , 2014, DOI: 10.4236/jemaa.2014.613041
Abstract: This paper consolidates the activity of design and fabrication of 2.9 - 4.32 GHz, 4.3 - 6.42 GHz, and 6.4 - 8.4 GHz filter bank. Novel compact microstrip bandpass filters with stub-loaded multi-mode resonators are proposed. Simulated results indicate that all the filters exhibit insertion losses less than 1.5 dB with passband ripples of 1 dB and sharp attenuations of above 40 dB in their stopbands. The maximums of input and output VSWRs are 1.742 and 1.734, respectively. Due to fabrication error, the initial measured passbands show frequency shifts and insertion losses in upper passbands deteriorate seriously. After tuning of the filter bank, measured results imply that the input and output VSWRs are found lower than 2.135 and 2.187, and the insertion loss in 1 dB bandwidth is less than 2.52 dB. Filter bank has a sharp skirt and out-of-band rejection levels approaching to 40 dB in all desired stopbands except at the frequencies near 2f0.
An Improved Fast SPIHT Image Compression Algorithm for Aerial Applications
Ning Zhang,Longxu Jin,Yinhua Wu,Ke Zhang
Journal of Multimedia , 2011, DOI: 10.4304/jmm.6.6.494-501
Abstract: In this paper, an improved fast SPIHT algorithm has been presented. SPIHT and NLS (Not List SPIHT) are efficient compression algorithms, but the algorithms application is limited by the shortcomings of the poor error resistance and slow compression speed in the aviation areas. In this paper, the error resilience and the compression speed are improved. The remote sensing images are decomposed by Le Gall5/3 wavelet, and wavelet coefficients are indexed, scanned and allocated by the means of family blocks. The bit-plane importance is predicted by bitwise OR, so the N bit-planes can be encoded at the same time. Compared with the SPIHT algorithm, this improved algorithm is easy implemented by hardware, and the compression speed is improved. The PSNR of reconstructed images encoded by fast SPIHT is higher than SPIHT and CCSDS from 0.3 to 0.9db, and the speed is 4-6 times faster than SPIHT encoding process. The algorithm meets the high speed and reliability requirements of aerial applications.
Dynamic Equivalence: Features and Merits
Yinhua Xiang
Theory and Practice in Language Studies , 2011, DOI: 10.4304/tpls.1.9.1253-1255
Abstract: Euivalence is an essential requirement of translation and the main task of translation activity is to establish equivalence between the source text and the target text. Such being the case, different principles of translation equivalence have been put forward, of which the principle of dynamic equivalence put forward by Nida is the most familiar to and has the greatest influence on Chinese translation circle. It has its own features and boasts a lot of merits, which will be discussed in this paper.
Validity of the Principle of Dynamic Equivalence
Yinhua Xiang
Journal of Language Teaching and Research , 2012, DOI: 10.4304/jltr.3.1.200-204
Abstract: The principle of dynamic equivalence aims at arousing similar response between the source text readers and the target text readers. To achieve this goal, a D-E translation should strive for the "closest natural equivalent" of the source text. This approach toward translation is of great validity which is based on linguistic commonness of all langages and cultural and psychological similarities of all human beings. The former enables the possibility of faithful reproduction of the original message, namely, the "closest natural equivalent of the source- language message" while the latter guarantee the possibility of "similar response."
Diagnosis of Brugian Filariasis by Loop-Mediated Isothermal Amplification
Catherine B. Poole,Nathan A. Tanner,Yinhua Zhang,Thomas C. Evans Jr.,Clotilde K. S. Carlow
PLOS Neglected Tropical Diseases , 2012, DOI: 10.1371/journal.pntd.0001948
Abstract: In this study we developed and evaluated a Brugia Hha I repeat loop-mediated isothermal amplification (LAMP) assay for the rapid detection of Brugia genomic DNA. Amplification was detected using turbidity or fluorescence as readouts. Reactions generated a turbidity threshold value or a clear visual positive within 30 minutes using purified genomic DNA equivalent to one microfilaria. Similar results were obtained using DNA isolated from blood samples containing B. malayi microfilariae. Amplification was specific to B. malayi and B. timori, as no turbidity was observed using DNA from the related filarial parasites Wuchereria bancrofti, Onchocerca volvulus or Dirofilaria immitis, or from human or mosquito. Furthermore, the assay was most robust using a new strand-displacing DNA polymerase termed Bst 2.0 compared to wild-type Bst DNA polymerase, large fragment. The results indicate that the Brugia Hha I repeat LAMP assay is rapid, sensitive and Brugia-specific with the potential to be developed further as a field tool for diagnosis and mapping of brugian filariasis.
Blockade of the Formation of Insoluble Ubiquitinated Protein Aggregates by EGCG3”Me in the Alloxan-Induced Diabetic Kidney
Shuxian Cai, Yuan Zhong, Yinhua Li, Jianan Huang, Jing Zhang, Guoan Luo, Zhonghua Liu
PLOS ONE , 2013, DOI: 10.1371/journal.pone.0075687
Abstract: Background Renal accumulation of reactive carbonyl compounds (RCCs) has been linked to the progression of diabetic nephropathy. We previously demonstrated that carbonyl stress induces the formation of amino-carbonyl cross-links and sharply increases the content of β-sheet-rich structures, which is the seed of insoluble aggregates formation, and tea catechin (-)-epigallocatechin 3-gallate (EGCG) can reverse this process in vitro and in vivo. In this study, methylated derivative (-)-epigallocatechin-3-O-(3-O-methyl)-gallate (EGCG3”Me) was hypothesized to neutralize carbonyl stress mediating the formation of insoluble ubiquitinated protein (IUP) aggregates, and reduce the early development of diabetic nephropathy. Methods and results Diabetes was induced in mice by intraperitoneally injecting alloxan monohydrate (200 mg/kg/d) twice and administering EGCG3”Me by gavage for 15 d. Reagent case and western blot results showed that, in diabetic kidneys, the carbonyl proteins in the serum increased; and in insoluble protein fraction, 4-hydroxynonenal-modified proteins, IUP aggregates and p62 accumulated; FT-IR study demonstrated that the lipid content, anti-parallel β-sheet structure and aggregates increased. EGCG3”Me treatment could effectively reverse this process, even better than the negative control treatment. Conclusions EGCG3”Me exhibiting anti-β-sheet-rich IUP aggregate properties, maybe represents a new strategy to impede the progression of diabetic nephropathy and other diabetic complications.
Genome-Wide Mapping of Virulence in Brown Planthopper Identifies Loci That Break Down Host Plant Resistance
Shengli Jing, Lei Zhang, Yinhua Ma, Bingfang Liu, Yan Zhao, Hangjin Yu, Xi Zhou, Rui Qin, Lili Zhu, Guangcun He
PLOS ONE , 2014, DOI: 10.1371/journal.pone.0098911
Abstract: Insects and plants have coexisted for over 350 million years and their interactions have affected ecosystems and agricultural practices worldwide. Variation in herbivorous insects' virulence to circumvent host resistance has been extensively documented. However, despite decades of investigation, the genetic foundations of virulence are currently unknown. The brown planthopper (Nilaparvata lugens) is the most destructive rice (Oryza sativa) pest in the world. The identification of the resistance gene Bph1 and its introduction in commercial rice varieties prompted the emergence of a new virulent brown planthopper biotype that was able to break the resistance conferred by Bph1. In this study, we aimed to construct a high density linkage map for the brown planthopper and identify the loci responsible for its virulence in order to determine their genetic architecture. Based on genotyping data for hundreds of molecular markers in three mapping populations, we constructed the most comprehensive linkage map available for this species, covering 96.6% of its genome. Fifteen chromosomes were anchored with 124 gene-specific markers. Using genome-wide scanning and interval mapping, the Qhp7 locus that governs preference for Bph1 plants was mapped to a 0.1 cM region of chromosome 7. In addition, two major QTLs that govern the rate of insect growth on resistant rice plants were identified on chromosomes 5 (Qgr5) and 14 (Qgr14). This is the first study to successfully locate virulence in the genome of this important agricultural insect by marker-based genetic mapping. Our results show that the virulence which overcomes the resistance conferred by Bph1 is controlled by a few major genes and that the components of virulence originate from independent genetic characters. The isolation of these loci will enable the elucidation of the molecular mechanisms underpinning the rice-brown planthopper interaction and facilitate the development of durable approaches for controlling this most destructive agricultural insect.
Mining Predicted Essential Genes of Brugia malayi for Nematode Drug Targets
Sanjay Kumar, Kshitiz Chaudhary, Jeremy M. Foster, Jacopo F. Novelli, Yinhua Zhang, Shiliang Wang, David Spiro, Elodie Ghedin, Clotilde K. S. Carlow
PLOS ONE , 2007, DOI: 10.1371/journal.pone.0001189
Abstract: We report results from the first genome-wide application of a rational drug target selection methodology to a metazoan pathogen genome, the completed draft sequence of Brugia malayi, a parasitic nematode responsible for human lymphatic filariasis. More than 1.5 billion people worldwide are at risk of contracting lymphatic filariasis and onchocerciasis, a related filarial disease. Drug treatments for filariasis have not changed significantly in over 20 years, and with the risk of resistance rising, there is an urgent need for the development of new anti-filarial drug therapies. The recent publication of the draft genomic sequence for B. malayi enables a genome-wide search for new drug targets. However, there is no functional genomics data in B. malayi to guide the selection of potential drug targets. To circumvent this problem, we have utilized the free-living model nematode Caenorhabditis elegans as a surrogate for B. malayi. Sequence comparisons between the two genomes allow us to map C. elegans orthologs to B. malayi genes. Using these orthology mappings and by incorporating the extensive genomic and functional genomic data, including genome-wide RNAi screens, that already exist for C. elegans, we identify potentially essential genes in B. malayi. Further incorporation of human host genome sequence data and a custom algorithm for prioritization enables us to collect and rank nearly 600 drug target candidates. Previously identified potential drug targets cluster near the top of our prioritized list, lending credibility to our methodology. Over-represented Gene Ontology terms, predicted InterPro domains, and RNAi phenotypes of C. elegans orthologs associated with the potential target pool are identified. By virtue of the selection procedure, the potential B.?malayi drug targets highlight components of key processes in nematode biology such as central metabolism, molting and regulation of gene expression.

Xiong Xiufang,Zhang Yinhua,Gong Fujun,Nan Peng,Yuan Ping,Wang Guoliang,

植物科学学报 , 1999,
Abstract: 用色谱-质谱联用技术对湖北产土荆芥挥发油的化学成分进行了分析。鉴定了80种组分。其中主要组分是:薄荷醇(31.331%)α-松油烯(13.210%),香芹烯醇(8.526%)、对伞花烃(8.343%)、1,8-桉叶油素(7.417%)等5种化合物。被鉴定的80种成分,共占挥发油总含量的99.112%。

Gong Fujun,Wang Guoliang,Zhang Yinhua,Nan Peng,Yuan Ping,

植物科学学报 , 1999,
Abstract: 八角栎是八角枫科八角枫属药用植物,分布较广。用气相色谱/质谱/计算机联用技术(GC/MS/DS)分析了水蒸气蒸馏得到的八角枫挥发油,鉴定出59种化学成分,其主要成分为:1,8-桉叶素(43.325%)、β-侧然(10.713%)、丁香酚甲醚(7.088)、α-松油醇(7.017%)、α-蒎烯(5.830%)等5种化合物。被鉴定的59种成分,共占挥发油总量的97.04%。
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