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Search Results: 1 - 10 of 8870 matches for " Haijian Bing "
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Historical trends of heavy metal contamination and their sources in lacustrine sediment from Xijiu Lake, Taihu Lake Catchment, China
Haijian Bing,Yanhong Wu,Zhaobin Sun,Shuchun Yao,
Haijian Bing
,Yanhong Wu,Zhaobin Sun,Shuchun Yao

环境科学学报(英文版) , 2011,
Abstract: Concentrations of Cd, Cr, Cu, Pb, Zn and Hg in Xijiu Lake sediment from the Taihu Lake catchment, China, were analyzed. Their contamination state was investigated based on the geoaccumulation index and enrichment factors. Statistical analysis was used to differentiate the anthropogenic versus natural sources of heavy metals (HMs), and the anthropogenic accumulation fluxes were calculated to quantify anthropogenic contribution to HMs. The results indicated that the lake sediment had been heavily contaminated by Cd, enrichment of Zn and Hg was at a relatively high level, while that of Cu and Pb was in the lower-to-moderate level and Cr was in the low enrichment level. Sources of Cr in the sediment were mainly from natural inputs, while other metals, especially Cd, were predominantly derived from anthropogenic sources. In the past century, anthropogenic accumulation fluxes of Pb, Zn and Hg increased by 0.1-47.3 mg/(cm2.yr), 2.4-398.1 mg/(cm2.yr), and 3.7-110.3 ng/(m2.yr), respectively, accounting for most inputs of HMs entering the sediment. The contamination state of HMs varied with industrial development of the catchment, which demonstrated that contamination started in the early 20th century, reached the maximal level between the mid-1970s and mid-1990s, and decreased a little after the implementation of constraints on high contamination industries, although the contamination of some HMs, such as Cd, Zn and Hg, is still at high levels.
Design of Time Division MUX and DEMUX for Large Optical Transceiver
Haijian Yang
Computer and Information Science , 2011, DOI: 10.5539/cis.v4n5p71
Abstract: The working principle of large optical transceiver is introduced in this article, and the time division MUX and the time division DEMUX are designed by the online system programmable technology and the FPGA (Field Programmable Logic Array), including hardware design, software design, and testing. The transmitting design and the receiving design method of time division MUX are introduced in detail, and a kind of time division MUX method based on synchronic control character is designed to realize the reliable transmission of VGA signals, PAL signals, voice signals, digital IO, USB data, and network signals, which is helpful and practical to enhance the capacity of transmission channel and save the fiber resources.
Speech Signal Recovery Based on Source Separation and Noise Suppression  [PDF]
Zhe Wang, Haijian Zhang, Guoan Bi
Journal of Computer and Communications (JCC) , 2014, DOI: 10.4236/jcc.2014.29015
Abstract:

In this paper, a speech signal recovery algorithm is presented for a personalized voice command automatic recognition system in vehicle and restaurant environments. This novel algorithm is able to separate a mixed speech source from multiple speakers, detect presence/absence of speakers by tracking the higher magnitude portion of speech power spectrum and adaptively suppress noises. An automatic speech recognition (ASR) process to deal with the multi-speaker task is designed and implemented. Evaluation tests have been carried out by using the speech da- tabase NOIZEUS and the experimental results show that the proposed algorithm achieves impressive performance improvements.

Expression of HMGR in Lilu cattle tissues  [PDF]
Guifen Liu, Fachun Wan, Xiaomu Liu, Haijian Cheng, Xiuwen Tan, Enliang Song
Open Journal of Animal Sciences (OJAS) , 2012, DOI: 10.4236/ojas.2012.21007
Abstract: The 3-hydroxy-3-methylglutaryl-CoA reductase (HMGR ) is an essential enzyme in cholesterol biosynthesis. To study the expression of HMGR in adipose and muscle tissues, and some performance indexes of four age stages, twelve Lilu cattle were selected. The results indicated that the Lilu beef cattle have good production and slaughter performance. HMGR mRNA expression level in adipose was higher than in muscle, but the trend in adipose was the same as in muscle. HMGR mRNA expression is difference in adipose and muscle tissues suggesting this gene is expressed in a tissue-dependent manner in cattle. Understanding the causes of variation in HMGR gene expression may provide crucial information about cholesterol biosynthesis in Lilu beef cattle.
A multilayer neural network model for perception of rotational motion
Aike Guo,Haijian Sun,Xianyi Yang
Science China Life Sciences , 1997, DOI: 10.1007/BF02879111
Abstract: A multilayer neural nerwork model for the perception of rotational motion has been developed using Reichardt’s motion detector array of correlation type, Kohonen’s self-organized feature map and Schuster-Wagner’s oscillating neural network. It is shown that the unsupervised learning could make the neurons on the second layer of the network tend to be self-organized in a form resembling columnar organization of selective directions in area MT of the primate’s visual cortex. The output layer can interpret rotation information and give the directions and velocities of rotational motion. The computer simulation results are in agreement with some psychophysical observations of rotational perception. It is demonstrated that the temporal correlation between the oscillating neurons would be powerful for solving the “binding problem” of shear components of rotational motion.
Existence and Global Stability of a Periodic Solution for Discrete-Time Cellular Neural Networks
Haijian Shao,Haikun Wei,Haoxiang Wang
Discrete Dynamics in Nature and Society , 2012, DOI: 10.1155/2012/645214
Abstract:
Spectral Correlation of Multicarrier Modulated Signals and Its Application for Signal Detection
Zhang Haijian,Le Ruyet Didier,Terré Michel
EURASIP Journal on Advances in Signal Processing , 2010,
Abstract: Spectral correlation theory for cyclostationary time-series signals has been studied for decades. Explicit formulas of spectral correlation function for various types of analog-modulated and digital-modulated signals are already derived. In this paper, we investigate and exploit the cyclostationarity characteristics for two kinds of multicarrier modulated (MCM) signals: conventional OFDM and filter bank based multicarrier (FBMC) signals. The spectral correlation characterization of MCM signal can be described by a special linear periodic time-variant (LPTV) system. Using this LPTV description, we have derived the explicit theoretical formulas of nonconjugate and conjugate cyclic autocorrelation function (CAF) and spectral correlation function (SCF) for OFDM and FBMC signals. According to theoretical spectral analysis, Cyclostationary Signatures (CS) are artificially embedded into MCM signal and a low-complexity signature detector is, therefore, presented for detecting MCM signal. Theoretical analysis and simulation results demonstrate the efficiency and robustness of this CS detector compared to traditionary energy detector.
Protein Globule Formation in the Liver Graft during Cold Preservation for Liver Transplantation: Its Clinical and Pathological Significance  [PDF]
Changyin Feng, Tongmei He, Haijian Huang, Lijuan Qu, Yi Jiang, Wenhua Zhang, Zhiyong Zheng
Open Journal of Pathology (OJPathology) , 2013, DOI: 10.4236/ojpathology.2013.33022
Abstract:

In liver transplantation, liver graft ischemia-reperfusion injury occurs mainly due to cold preservation and warm reperfusion. In this research, we study the affection of plasma protein of the donor on liver graft during cold preservation and warm reperfusion. In this study, 34 liver transplantations were performed from 2007 to 2010, and the clinical data were collected retrospectively from the Dongfang Hospital database. 34 specimens were harvested from 34 liver grafts when graft trimming as Group A and 34 specimens harvested from the same 34 liver grafts during liver transplantation surgery but before abdominal closure as B group. All liver tissue specimens were fixed with 40 g/L neutral formalin, embedded in paraffin. Light microscopy, transmission electron microscopy, Periodic Acid-Schiff (PAS) stain and immunohistochemical stain of IgG, IgM, IgA, C3d, C4d, Fib, C1q, and CD61 were used. In this study, we found that eosinophilic bodies emerged in liver lobes during liver transplantation which had not been reported previously in the literature. 1) Protein globules were found exclusively in liver graft specimens. The globules were round or oval with sharp edges, measured approximately 1.59 to 9.41 μm in diameter, and were scattered in the liver sinusoids or space of Disse or hepatocyte cytoplasm, were stained with IgG, IgM, IgA, Fib, C3d by immunohistochemical staining; 2) There was no statistical significant difference of protein globules number between A group and B group (P > 0.05); 3) IRI score of B group was not correlated with protein globules number (P > 0.05). Protein globules contain plasma composition, and may form during cold preservation.

Genetic Variant rs401681 at 5p15.33 Modifies Susceptibility to Lung Cancer but Not Esophageal Squamous Cell Carcinoma
Man Jiang, Haijian Wu, Chengyong Qin
PLOS ONE , 2013, DOI: 10.1371/journal.pone.0084277
Abstract: Background The human 5p15.33 locus contains two well-known genes, the telomerase reverse transcriptase (TERT) and cleft lip and palate transmembrane 1-like (CLPTM1L) genes, which have been implicated in carcinogenesis. A common sequence variant, rs401681, located in an intronic region of CLPTM1L, has been reported to be associated with lung cancer risk based on genome-wide association study. However, subsequent replication studies in diverse populations have yielded inconsistent results. In addition, genetic variants at 5p15.33, including rs401681, have been shown to be involved in the susceptibility to multiple malignancies. Nevertheless, the role of these TERT-CLPTM1L variants in the etiology of esophageal squamous cell carcinoma (ESCC) remains unknown. Methods We genotyped the rs401681 polymorphism using TaqMan methodology and analyzed its association with the risk of lung cancer and ESCC in a case–control study of 1,479 cancer patients (726 with lung cancer and 753 with ESCC) and 860 healthy individuals. Results Logistic regression analyses revealed that rs401681 T genotypes were associated with a significantly decreased risk of lung cancer (CT vs. CC: adjusted OR = 0.782, 95% CI = 0.625–0.978, P = 0.031; CT/TT vs. CC: adjusted OR = 0.786; 95% CI = 0.635–0.972, P = 0.026). Stratification analysis by histology type indicated that rs401681 T genotypes were associated with a significantly reduced risk of both adenocarcinoma and squamous cell carcinoma. Furthermore, no significant association was observed between rs401681 and the risk of ESCC (CT vs. CC: adjusted OR = 0.910, 95% CI = 0.734–1.129, P = 0.392; TT vs. CC: adjusted OR = 0.897, 95%CI = 0.624–1.290, P = 0.558; CT/TT vs. CC: adjusted OR = 0.908, 95% CI = 0.740–1.114, P = 0.355). Conclusions Our findings provide further evidence supporting rs401681 as a genetic variant associated with the risk of lung cancer. In addition, we investigated the correlation between the rs401681 variant and the risk of ESCC in a Han Chinese population, and our results suggest that this genetic variant may not be involved in ESCC risk.
Existence and Global Stability of a Periodic Solution for Discrete-Time Cellular Neural Networks
Haijian Shao,Haikun Wei,Haoxiang Wang
Discrete Dynamics in Nature and Society , 2012, DOI: 10.1155/2012/645214
Abstract: A novel sufficient condition is developed to obtain the discrete-time analogues of cellular neural network (CNN) with periodic coefficients in the three-dimensional space. Existence and global stability of a periodic solution for the discrete-time cellular neural network (DT-CNN) are analysed by utilizing continuation theorem of coincidence degree theory and Lyapunov stability theory, respectively. In addition, an illustrative numerical example is presented to verify the effectiveness of the proposed results. 1. Introduction Cellular neural networks (CNNs) are the basis of both discrete-time cellular neural networks (DT-CNNs) [1] and the cellular neural networks universal machine (CNNs-UM). The dynamical behaviour of Chua and Yang cellular neural network (CY-CNN) is given by the state equation where , , , and denotes input bias, input, output, and state variable of each cell, respectively. is the t-neighbourhood of cell as , ?? and denote the position of the cell in the network, and denote the position of the neighbour cell relative to the cell in consideration. is the nonlinear weights template matrices for input feedback and is the corresponding template matrices for the outputs of neighbour cells. Non-linearity means that templates can change over time. A large number of cellular neural networks (CNNs) models have appeared in the literature [2–4], and these models differ in cell complexity, parameterization, cell dynamics, and network topology. Various generalizations of cellular neural networks have attracted attention of scientific community due to their promising potential for tasks of classification, associative memory, parallel computation [5–9], pattern recognition, computer vision, and solving any optimization problem [10–13]. Such applications rely on the existence of equilibrium points and the qualitative properties of cellular neural networks. Discrete-time cellular neural networks (DT-CNNs) have been studied both in theory and applications. Previous results introduced many properties of DT-CNN in the two dimensional plane. For instance, [14] has been successfully applied to investigate the discrete-time analogues of cellular neural network (CNN) with variable coefficients in the two-dimensional plane. However, three-dimensional structure is more accurate, specific, and closer to real structures of CNN. Based on the above discussion, this paper proposes some effective results of DT-CNN in the three-dimensional space. Motivated by the constructing of continuous system (1.1), the discrete analogue of the system (1.1) is considered as follows:
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