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Search Results: 1 - 10 of 40757 matches for " Xiao-fen Pang "
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Quantum Secure Direct Communication with Five-Qubit Entangled State

LIN Song,GAO Fei,LIU Xiao-Fen,

中国物理快报 , 2011,
Neighborhood covering rough set model of fuzzy decision system
Bai-Ting Zhao,Xiao-Fen Jia
International Journal of Computer Science Issues , 2013,
Abstract: The neighborhood covering rough set model is established for the fuzziness of decision system. Firstly, the knowledge representation of fuzzy decision system is analyzed. Then fuzzy neighborhood relation is proposed to measure the fuzziness of the decision system. Finally prove that the classical indiscernibility relations and classical neighborhood relationship are special case of fuzzy neighborhood relations. Fuzzy neighborhood covering rough set model solved the problem of processing fuzzy attribute, and deal with the hybrid decision system which including both of fuzzy attributes and numerical attributes. The proved model expanded the applications of rough set.
Demosaicing Algorithm for Color Filter Arrays Based on SVMs
Xiao-Fen Jia,Bai-Ting Zhao
International Journal of Computer Science Issues , 2013,
Abstract: One color filter array (CFA) used in a digital camera allows only one of the red-green-blue primary color components to be sensed at each pixel, and interpolating the other missing two components by methods known as demosaicing. A novel support vector machines (SVMs) based demosicing algorithm is proposed to reduce edge artifacts and false color artifacts effectively. The proposed algorithm is a four-step method. Firstly, construct middle plane Kr or Kb on the mosaic image. Secondly, train SVMs with the trained samples constructed on the middle plane. Thirdly, interpolate the unknown value of the middle plane Kr or Kb. Finally, calculate the missing pixel value. Experimental results showed that the proposed approach produced visually pleasing full-color result images and obtained better PSNR values than other demosaicing algorithms.
Noise analysis and column FPN suppression technology
Xiao-Fen Jia,Bai-Ting Zhao
International Journal of Computer Science Issues , 2013,
Abstract: Noise is an important indicator that affects the image quality. Among the different processing strategies implemented in image sensors, the effect on the noise is complicated. The two types of noise that influences the imaging quality of the digital camera are analyzed firstly. The optical signal and reset signal of the typical correlated double sampling (CDS) are read out through two column amplifiers (CA), respectively. The performance of the two column amplifiers are not exactly the same, resulting in itself will bring the column FPN. To suppress the column FPN effectively, a single amplifier CDS scheme is proposed, which have only one CA, the power consumption and area of the proposed CDS circuit is reduced by half.
Target Deletion of the Cytoskeleton-Associated Protein Palladin Does Not Impair Neurite Outgrowth in Mice
Run-Zhe Shu, Feng Zhang, Xue-Song Liu, Chun-Liang Li, Long Wang, Yi-Lin Tai, Xiao-Lin Wu, Xue Yang, Xiao-Dong Liao, Ying Jin, Ming-Min Gu, Lei Huang, Xiao-Fen Pang, Zhu-Gang Wang
PLOS ONE , 2009, DOI: 10.1371/journal.pone.0006916
Abstract: Palladin is an actin cytoskeleton–associated protein which is crucial for cell morphogenesis and motility. Previous studies have shown that palladin is localized to the axonal growth cone in neurons and may play an important role in axonal extension. Previously, we have generated palladin knockout mice which display cranial neural tube closure defect and embryonic lethality before embryonic day 15.5 (E15.5). To further study the role of palladin in the developing nervous system, we examined the innervation of palladin-deficient mouse embryos since the 200 kd, 140 kd, 90–92 kd and 50 kd palladin isoforms were undetectable in the mutant mouse embryo brain. Contrary to the results of previous studies, we found no inhibition of the axonal extension in palladin-deficient mouse embryos. The cortical neurons derived from palladin-deficient mice also showed no significant difference in neurite outgrowth as compared with those from wild-type mice. Moreover, no difference was found in neurite outgrowth of neural stem cell derived-neurons between palladin-deficient mice and wild-type mice. In conclusion, these results suggest that palladin is dispensable for normal neurite outgrowth in mice.
Deficiency of Adiponectin Protects against Ovariectomy-Induced Osteoporosis in Mice
Fang Wang, Pei-xia Wang, Xiao-lin Wu, Su-ying Dang, Yan Chen, Ying-yin Ni, Li-hong Gao, Shun-yuan Lu, Ying Kuang, Lei Huang, Jian Fei, Zhu-gang Wang, Xiao-fen Pang
PLOS ONE , 2013, DOI: 10.1371/journal.pone.0068497
Abstract: Adipokine adiponectin (APN) has been recently reported to play a role in regulating bone mineral density (BMD). To explore the mechanism by which APN affects BMD, we investigated BMD and biomechanical strength properties of the femur and vertebra in sham-operated (Sham) and ovariectomized (OVX) APN knockout (KO) mice as compared to their operated wild-type (WT) littermates. The results show that APN deficiency has no effect on BMD but induces increased ALP activity and osteoclast cell number. While OVX indeed leads to significant bone loss in both femora and vertebras of WT mice with comparable osteogenic activity and a significant increase in osteoclast cell number when compared to that of sham control. However, no differences in BMD, ALP activity and osteoclast cell number were found between Sham and OVX mice deficient for APN. Further studies using bone marrow derived mesenchymal stem cells (MSCs) demonstrate an enhanced osteogenic differentiation and extracellular matrix calcification in APN KO mice. The possible mechanism for APN deletion induced acceleration of osteogenesis could involve increased proliferation of MSCs and higher expression of Runx2 and Osterix genes. These findings indicate that APN deficiency can protect against OVX-induced osteoporosis in mice, suggesting a potential role of APN in regulating the balance of bone formation and bone resorption, especially in the development of post-menopausal osteoporosis.
Telomere Recombination Accelerates Cellular Aging in Saccharomyces cerevisiae
Xiao-Fen Chen,Fei-Long Meng,Jin-Qiu Zhou
PLOS Genetics , 2009, DOI: 10.1371/journal.pgen.1000535
Abstract: Telomeres are nucleoprotein structures located at the linear ends of eukaryotic chromosomes. Telomere integrity is required for cell proliferation and survival. Although the vast majority of eukaryotic species use telomerase as a primary means for telomere maintenance, a few species can use recombination or retrotransposon-mediated maintenance pathways. Since Saccharomyces cerevisiae can use both telomerase and recombination to replicate telomeres, budding yeast provides a useful system with which to examine the evolutionary advantages of telomerase and recombination in preserving an organism or cell under natural selection. In this study, we examined the life span in telomerase-null, post-senescent type II survivors that have employed homologous recombination to replicate their telomeres. Type II recombination survivors stably maintained chromosomal integrity but exhibited a significantly reduced replicative life span. Normal patterns of cell morphology at the end of a replicative life span and aging-dependent sterility were observed in telomerase-null type II survivors, suggesting the type II survivors aged prematurely in a manner that is phenotypically consistent with that of wild-type senescent cells. The shortened life span of type II survivors was extended by calorie restriction or TOR1 deletion, but not by Fob1p inactivation or Sir2p over-expression. Intriguingly, rDNA recombination was decreased in type II survivors, indicating that the premature aging of type II survivors was not caused by an increase in extra-chromosomal rDNA circle accumulation. Reintroduction of telomerase activity immediately restored the replicative life span of type II survivors despite their heterogeneous telomeres. These results suggest that telomere recombination accelerates cellular aging in telomerase-null type II survivors and that telomerase is likely a superior telomere maintenance pathway in sustaining yeast replicative life span.
Epistatic Association Mapping in Homozygous Crop Cultivars
Hai-Yan Lü,Xiao-Fen Liu,Shi-Ping Wei,Yuan-Ming Zhang
PLOS ONE , 2012, DOI: 10.1371/journal.pone.0017773
Abstract: The genetic dissection of complex traits plays a crucial role in crop breeding. However, genetic analysis and crop breeding have heretofore been performed separately. In this study, we designed a new approach that integrates epistatic association analysis in crop cultivars with breeding by design. First, we proposed an epistatic association mapping (EAM) approach in homozygous crop cultivars. The phenotypic values of complex traits, along with molecular marker information, were used to perform EAM. In our EAM, all the main-effect quantitative trait loci (QTLs), environmental effects, QTL-by-environment interactions and QTL-by-QTL interactions were included in a full model and estimated by empirical Bayes approach. A series of Monte Carlo simulations was performed to confirm the reliability of the new method. Next, the information from all detected QTLs was used to mine novel alleles for each locus and to design elite cross combination. Finally, the new approach was adopted to dissect the genetic basis of seed length in 215 soybean cultivars obtained, by stratified random sampling, from 6 geographic ecotypes in China. As a result, 19 main-effect QTLs and 3 epistatic QTLs were identified, more than 10 novel alleles were mined and 3 elite parental combinations, such as Daqingdou and Zhengzhou790034, were predicted.
Using Johnson Curves to Control Non-normal Process

ZHUO De-bao,LIU Xiao-fen,

系统工程理论与实践 , 1999,
Abstract: In practice, there are numbers of non\|normal processes, the paper outlines quality control methods that used in non\|normal process. On the basis of that, we privide a wider and easier method, using Johnson curves to describe non\|normal data of control process.
Research on modelling digital paper-cut preservation

Xiao-Fen Wang,Ying-Rui Liu,Wen-Sheng Zhang,

国际自动化与计算杂志 , 2009,
Abstract: This paper studies the model of the digital preservation of paper-cut after analyzing the state-of-the-art of the preservation of intangible cultural heritage at home and abroad, focusing on paper-cutting in Hebei, China in a comprehensive approach of sociology, anthropology, folk art, folklore, communication, computer, and information science. Models, methods, and solutions for the preservation and retention of national and folk cultural heritage are proposed. A virtual multimedia interactive system framework of the digital preservation of national and folk cultural heritage is constructed. The standards of paper-cut digitization are studied. The main content of the paper involves: regulated data collection and recording of the scattered Chinese folk paper-cut works in Hebei; digitization, optimization, compression, classification, icon and pattern extraction, vectorization, and work analysis of the first-hand material. This paper also investigates the demonstration, dissemination, database construction, and retrieval of the classified material, icons, and patterns; the demonstration of the reconstruction and application of icon and pattern database; the design and development of an immersive virtual gaming platform of the multi-media scenes and production process of folk paper-cut.
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