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Search Results: 1 - 10 of 37049 matches for " Yueming Yan "
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Reliable Multicast with Network Coding in Lossy Wireless Networks  [PDF]
Wei Yan, Shengyu Yu, Yueming Cai
Int'l J. of Communications, Network and System Sciences (IJCNS) , 2010, DOI: 10.4236/ijcns.2010.310110
Abstract: To reduce the feedbacks between access point and all nodes in lossy wireless networks, a clustered system model consisting of a cluster head and multiple common nodes is investigated. Network coding has been proposed for more efficient retransmissions in reliable multicast. However, in existing schemes the access point retransmits coded packets, which causes severe delay and considerable feedbacks. In this paper, an XOR scheme based on clustered model is presented. For this scheme, the cluster head broadcasts combined packets by XORing lost packets appropriately to recover lost packets locally. We also analyze the performance in terms of expected number of transmissions. Simulation results verify theoretic analysis. And our results show that proposed XOR offers a compromise between ARQ and random linear network coding.
Exchange of Rural Residential Land in China
Wen Yan,Yueming Xu
Asian Social Science , 2010, DOI: 10.5539/ass.v6n6p111
Abstract: China’s economy is experiencing rapid urbanization, which is featured by both inefficient rural residential land and insufficient urban construction land. Another characteristic of China’s urbanization is the frequent phenomenon of “over-urbanization” in developing countries. Population cannot be urbanized as quickly as land, mainly because migrants moving out of rural areas have no affordability of the urban housing. The purpose of this paper is to establish a framework of coordinating urban construction land and rural residential land, changing the inefficient rural residential land into arable land and as the same time increasing the quota of urban construction land, which can both help to improve the supply of urban construction land and help to meet migrants’ residential needs in urban areas.
Overexpression of D-psicose 3-epimerase from Clostridium cellulolyticum H10 in Bacillus subtilis and its Prospect for D-psicose Production
Xiaobo Li,Yueming Zhu,Yan Zeng,Tongcun Zhang
Advance Journal of Food Science and Technology , 2013,
Abstract: The aim of this study was to overexpress the D-psicose 3-epimerase from Clostridium cellulolyticum H10 in food-grade microbe. This gene was cloned and expressed in Bacillus subtilis The results showed that the recombinant protein was soluble, bioactive, and expressed at high levels. The optimum pH and temperature of the enzyme were 8.0 and 50°C, respectively. The activity of the enzyme was not dependent on metal ions; however, some metal ions, such as Co, make the enzyme more thermostable. The Michaelis-Menten constant (Km) of the enzyme for D-psicose was much lower than that for D-tagatose, suggesting that the optimum substrate of the enzyme is D-psicose. D-Psicose 3-epimerase expressed in the food-grade B. subtilis may be used for the industrial production of D-psicose.
Quantitative Study of Lunisolar Precession Mechanism  [PDF]
Yueming Wu, Mingfu Cao
Journal of Geoscience and Environment Protection (GEP) , 2016, DOI: 10.4236/gep.2016.47021
According to Xiaodong Song et al.’s study about difference rotation in the Earth’s inner core, a physical model of lunar motion changing the angular momentum of the Earth’s circles is presented in this work. The Lunar motion makes there be a huge gap existing in the core angular momentum between far lunar hemisphere and near lunar hemisphere. The gap results in the difference rota-tion in the Earth’s inner core, meanwhile, it increases the angular velocity of far lunar hemisphere and decreases the angular velocity of near lunar hemisphere. The Earth’s liquid outer core gene-rates an astro-geodynamical effect including the difference rotation among the Earth’s circles. It is found that when the moon moves into the apogee or the perigee of the lunar orbit, and the moon phase is the upper and lower chords (i.e. semi-diameter place), the true anomaly of the moon will change from 270-degree back (or forward) to 90-degree; this results in the mantle shell of the Earth westward, and forms lunisolar precession, the vernal equinox westward and Chandler polar motion.
Proteome characterization of developing grains in bread wheat cultivars (Triticum aestivum L.)
Guangfang Guo, Dongwen Lv, Xing Yan, Saminathan Subburaj, Pei Ge, Xiaohui Li, Yingkao Hu, Yueming Yan
BMC Plant Biology , 2012, DOI: 10.1186/1471-2229-12-147
Abstract: Proteome characterization during grain development in Chinese bread wheat cultivars Jimai 20 and Zhoumai 16 with different quality properties was investigated by 2-DE and tandem MALDI-TOF/TOF-MS. Identification of 117 differentially accumulated protein spots representing 82 unique proteins and five main expression patterns enabled a chronological description of wheat grain formation. Significant proteome expression differences between the two cultivars were found; these included 14 protein spots that accumulated in both cultivars but with different patterns and 27 cultivar-different spots. Among the cultivar-different protein spots, 14 accumulated in higher abundance in Jimai 20 than in Zhoumai 16, and included NAD-dependent isocitrate dehydrogenase, triticin precursor, LMW-s glutenin subunit and replication factor C-like protein. These proteins are likely to be associated with superior gluten quality. In addition, some proteins such as class II chitinase and peroxidase 1 with isoforms in developing grains were shown to be phosphorylated by Pro-Q Diamond staining and phosphorprotein site prediction. Phosphorylation could have important roles in wheat grain development. qRT-PCR analysis demonstrated that transcriptional and translational expression patterns of many genes were significantly different.Wheat grain proteins displayed variable expression patterns at different developmental stages and a considerable number of protein spots showed differential accumulation between two cultivars. Differences in seed storage proteins were considered to be related to different quality performance of the flour from these wheat cultivars. Some proteins with isoforms were phosphorylated, and this may reflect their importance in grain development. Our results provide new insights into proteome characterization during grain development in different wheat genotypes.Wheat is one of the three most important crops in the world due to its value as a major food source and its unique suit
Genome-scale identification of Soybean BURP domain-containing genes and their expression under stress treatments
Hongliang Xu, Yaxuan Li, Yueming Yan, Ke Wang, Ya Gao, Yingkao Hu
BMC Plant Biology , 2010, DOI: 10.1186/1471-2229-10-197
Abstract: In this study, multiple bioinformatics approaches were employed to identify all the members of BURP family genes in soybean. A total of 23 BURP gene types were identified. These genes had diverse structures and were distributed on chromosome 1, 2, 4, 6, 7, 8, 11, 12, 13, 14, and 18. Phylogenetic analysis suggested that these BURP family genes could be classified into 5 subfamilies, and one of which defines a new subfamily, BURPV. Quantitative real-time PCR (qRT-PCR) analysis of transcript levels showed that 15 of the 23 genes had no expression specificity; 7 of them were specifically expressed in some of the tissues; and one of them was not expressed in any of the tissues or organs studied. The results of stress treatments showed that 17 of the 23 identified BURP family genes responded to at least one of the three stress treatments; 6 of them were not influenced by stress treatments even though a stress related cis-element was identified in the promoter region. No stress related cis-elements were found in promoter region of any BURPV member. However, qRT-PCR results indicated that all members from BURPV responded to at least one of the three stress treatments. More significantly, the members from the RD22-like subfamily showed no tissue-specific expression and they all responded to each of the three stress treatments.We have identified and classified all the BURP domain-containing genes in soybean. Their expression patterns in different tissues and under different stress treatments were detected using qRT-PCR. 15 out of 23 BURP genes in soybean had no tissue-specific expression, while 17 out of them were stress-responsive. The data provided an insight into the evolution of the gene family and suggested that many BURP family genes may be important for plants responding to stress conditions.The BURP domain-containing protein family is defined by its conserved amino acid motif whose name is based on four typical members, BNM2, USP, RD22, and PG1β. BURP domain-containin
Screening and identification of seed-specific genes using digital differential display tools combined with microarray data from common wheat
Xinglu Yang, Hongliang Xu, Wenhui Li, Le Li, Jinyue Sun, Yaxuan Li, Yueming Yan, Yingkao Hu
BMC Genomics , 2011, DOI: 10.1186/1471-2164-12-513
Abstract: A total of 201 unigenes were identified as the results of DDD screening and microarray database searching. The expressions of 6 of these were shown to be seed-specific by qRT-PCR analysis. Further GO enrichment analysis indicated that seed-specific genes were mainly associated with defense response, response to stress, multi-organism process, pathogenesis, extracellular region, nutrient reservoir activity, enzyme inhibitor activity, antioxidant activity and oxidoreductase activity. A comparison of this set of genes with the rice (Oryza sativa) genome was also performed and approximately three-fifths of them have rice counterparts. Between the counterparts, around 63% showed similar expression patterns according to the microarray data.In conclusion, the DDD screening combined with microarray data analysis is an effective strategy for the identification of seed-specific expressed genes in wheat. These seed-specific genes screened during this study will provide valuable information for further studies about the functions of these genes in wheat.As one of the most important crops in the world, the different processing characters of wheat such as milling, baking, and cooking are largely determined by the biochemical composition of the seeds [1]. The nutritional profile of the seed is determined by the physiological, biochemical and morphological changes during grain development. Some morphogenetic and metabolic processes are exclusively associated with seed maturation. All these fundamental processes are delicately regulated at the level of transcription. Therefore, it will be necessary to reveal the underlying molecular mechanisms determining grain quality [2,3], especially those genes whose expression patterns are seed-specific.The expression level of a candidate gene is commonly estimated using two analysis approaches referred to as 'analog' and 'digital' [4]. The analog approach is based on oligonucleotide probe hybridizations such as Northern blotting, mRNA differen
Gamma-secretase: from pathogenesis to therapeutics
Li Yueming
Molecular Neurodegeneration , 2012, DOI: 10.1186/1750-1326-7-s1-l4
A Simple Analysis Method of Products lifetime Distribution
Yueming Wang
Modern Applied Science , 2009, DOI: 10.5539/mas.v3n3p38
Abstract: The basis of reliability analysis is determining products lifetime distribution type, which is also a tedious job. In accordance with the failure of parametric estimation using probability papers and hypothetical examination, products lifetime distribution type is studied with linear regression analysis and Office Excel.
Power Perspective: A New Framework for Top Management Team Theory  [PDF]
Yueming Chen, Yuhui Ge, Zhiqiang Song
iBusiness (IB) , 2010, DOI: 10.4236/ib.2010.23035
Abstract: Top management team theory (TMTT) has been researching on the relationship between top management team (TMT) and organization outcome through demographic characteristic and its heterogeneity. As the researcher failed to solve the “black box” problem, they get no consistent findings. Power perspective of TMTT will help out of the research predicament, so to focus on combing and assessing the TMT power, demographic characteristic based TMTT research and TMT team process. Based on the early research works, new research framework of power-based TMTT and future research suggestions are proposed.
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