Publish in OALib Journal

ISSN: 2333-9721

APC: Only $99


Any time

2019 ( 71 )

2018 ( 542 )

2017 ( 471 )

2016 ( 482 )

Custom range...

Search Results: 1 - 10 of 32576 matches for " Jixin Huang "
All listed articles are free for downloading (OA Articles)
Page 1 /32576
Display every page Item
Analysis of Influence Factors of Tide-Dominated Estuaries Based on Deposition Numerical Simulation  [PDF]
Tao Tang, Jixin Huang, Yanshu Yin, Wenjie Feng
Open Journal of Yangtze Oil and Gas (OJOGas) , 2018, DOI: 10.4236/ojogas.2018.32012
Abstract: Tide-dominated estuaries sedimentary reservoir is a hot area of sedimentology research in recent years, and the important target of oil and gas exploration is one of the relatively few sedimentary systems. Based on the study of underground reservoirs, outcrop and modern sedimentation, scholars believe that the estuary is a sedimentary system formed by transgressive system tract, which is composed of a complex subfacies environment with obvious changes. Its formation is influenced by many factors. The purpose of this paper is to simulate the deposition process of estuaries by Delft-3D software, and to reveal the main controlling factors of estuarine reservoir formation. The factors are as follows. 1) The size of the river flow has a destructive effect on the formation of the estuarine sand bar in the estuary, but the effect is small. 2) Tidal energy plays a constructive role in estuarine sand bars in estuaries, and it is also the main force for the formation of estuarine reservoirs. 3) The composition of the sediments has an obvious influence on the formation of the estuarine reservoir, and the content of the mud is an important factor for the retention of the estuarine sand bar.
Automatic determination method of optimal thresholdbased on the bootstrapping technology
Wang Jixin, Wang Yan, Zhai Xinting, Huang Yajun, Wang Zhenyu
- , 2018, DOI: 10.3969/j.issn.1003-7985.2018.02.010
Abstract: In order to predict the extreme load of the mechanical components during the entire life, an automatic method based on the bootstrapping technology(BT)is proposed to determine the most suitable threshold. Based on all the turning points of the load history and a series of thresholds estimated in advance, the generalized Pareto distribution is established to fit the exceedances. The corresponding distribution parameters are estimated with the maximum likelihood method. Then, BT is employed to calculate the mean squared error(MSE)of each estimated threshold based on the exceedances and the specific distribution parameters. Finally, the threshold with the smallest MSE will be the optimal one. Compared to the kurtosis method and the mean excess function method, the average deviation of the probability density function of exceedances determined by BT reduces by 38.52% and 29.25%, respectively. Moreover, the quantile-quantile plot of the exceedances determined by BT is closer to a straight line. The results suggest the improvement of the modeling flexibility and the determined threshold precision. If the exceedances are insufficient, BT will enlarge their amount by resampling to solve the instability problem of the original distribution parameters.
Research of New Intelligent Controller

Huang Sunan,Shao Huihe,Qian Jixin,

自动化学报 , 1997,
Abstract: In this paper,we study a new intelligent controller.The controller can work adaptively by learning.The parameter of the controller can be determined by Fuzzy decision.The results of simulation show that our controller can achieve high performance.
Realization of a Covert Communication System Over the Public Switching Telephone Network
Jixin Liu,Zheming Lu
Information Technology Journal , 2009,
Abstract: In this study, a covert communication applying the vector quantization based information hiding algorithm and the Public Switching Telephone Network (PSTN) is implemented. The system aims at offering good security of the secret binary image message and the real-time performance that is very important for the speech calling of the telephone service. Therefore, we adopt a simple and effective encryption method for the secret binary image message prior to the embedding process. The embedding position is also protected by using a secret key. By using these methods, the requirement of short-term protection in the bursting phone call communication for the secret binary image message and the real-time encryption are both fulfilled. Furthermore, an information hiding algorithm based on vector quantization is proposed and the advantage of it is discussed. We evaluate the system with the ITU-T G.729a standard speech codec in StegoPhone, which is our platform for research on covert communication technology via PSTN. The experimental results show that our method has negligible hearing effects on the conversation speech and meet the requirement of the real-time calling conversation communication via PSTN.
Multivariate saddlepoint approximations in tail probability and conditional inference
John Kolassa,Jixin Li
Statistics , 2010, DOI: 10.3150/09-BEJ237
Abstract: We extend known saddlepoint tail probability approximations to multivariate cases, including multivariate conditional cases. Our approximation applies to both continuous and lattice variables, and requires the existence of a cumulant generating function. The method is applied to some examples, including a real data set from a case-control study of endometrial cancer. The method contains less terms and is easier to implement than existing methods, while showing an accuracy comparable to those methods.
Cost Control of the Transmission Congestion Management in Electricity Systems Based on Ant Colony Algorithm  [PDF]
Bin Liu, Jixin Kang, Nan Jiang, Yuanwei Jing
Energy and Power Engineering (EPE) , 2011, DOI: 10.4236/epe.2011.31003
Abstract: This paper investigates the cost control problem of congestion management model in the real-time power systems. An improved optimal congestion cost model is built by introducing the congestion factor in dealing with the cases: opening the generator side and load side simultaneously. The problem of real-time congestion management is transformed to a nonlinear programming problem. While the transmission congestion is maximum, the adjustment cost is minimum based on the ant colony algorithm, and the global optimal solu-tion is obtained. Simulation results show that the improved optimal model can obviously reduce the adjust-ment cost and the designed algorithm is safe and easy to implement.
Exercise Protects against Diet-Induced Insulin Resistance through Downregulation of Protein Kinase Cβ in Mice
Xiaoquan Rao, Jixin Zhong, Xiaohua Xu, Brianna Jordan, Santosh Maurya, Zachary Braunstein, Tse-Yao Wang, Wei Huang, Sudha Aggarwal, Muthu Periasamy, Sanjay Rajagopalan, Kamal Mehta, Qinghua Sun
PLOS ONE , 2013, DOI: 10.1371/journal.pone.0081364
Abstract: Physical exercise is an important and effective therapy for diabetes. However, its underlying mechanism is not fully understood. Protein kinase Cβ (PKCβ) has been suggested to be involved in the pathogenesis of obesity and insulin resistance, but the role of PKCβ in exercise-induced improvements in insulin resistance is completely unknown. In this study, we evaluated the involvement of PKCβ in exercise-attenuated insulin resistance in high-fat diet (HFD)-fed mice. PKCβ-/- and wild-type mice were fed a HFD with or without exercise training. PKC protein expression, body and tissue weight change, glucose and insulin tolerance, metabolic rate, mitochondria size and number, adipose inflammation, and AKT activation were determined to evaluate insulin sensitivity and metabolic changes after intervention. PKCβ expression decreased in both skeletal muscle and liver tissue after exercise. Exercise and PKCβ deficiency can alleviate HFD-induced insulin resistance, as evidenced by improved insulin tolerance. In addition, fat accumulation and mitochondrial dysfunction induced by HFD were also ameliorated by both exercise and PKCβ deficiency. On the other hand, exercise had little effect on PKCβ-/- mice. Further, our data indicated improved activation of AKT, the downstream signal molecule of insulin, in skeletal muscle and liver of exercised mice, whereas PKCβ deficiency blunted the difference between sedentary and exercised mice. These results suggest that downregulation of PKCβ contributes to exercise-induced improvement of insulin resistance in HFD-fed mice.
Influence of Acupuncture Stimulation on Cerebral Network in Functional Diarrhea
Siyuan Zhou,Fang Zeng,Jixin Liu,Hui Zheng,Wenjing Huang,Ting Liu,Dashuai Chen,Wei Qin,Qiyong Gong,Jie Tian,Ying Li
Evidence-Based Complementary and Alternative Medicine , 2013, DOI: 10.1155/2013/975769
Abstract: Acupuncture is a commonly used therapy for treating functional diarrhea (FD), although there is limited knowledge on the mechanism. The objectives of this study were to investigate the differences in brain activities elicited by acupuncture between FD patients and healthy controls (HC) so as to explore the possible mechanism. Eighteen FD patients and eighteen HC received 10 sessions of acupuncture treatment at ST25 acupoints. Functional magnetic resonance imaging (fMRI) scans were, respectively, performed before and after acupuncture. The defecation frequency, Bristol stool form scale (SBFS), and MOS 36-item Short Healthy Survey (SF-36) were employed to evaluate the clinical efficacy. After acupuncture, the FD patients showed a significant decrease in defecation frequency and BSFS score. The regional homogeneity (ReHo) map showed a decrease in the paracentral lobule and postcentral gyrus, and an increase in the angular gyrus, insula, anterior cingulate cortex (ACC), and precuneus in the FD group. Moreover, the changes in ReHo values in the ACC were correlated with the reduction in defecation frequency. Decreasing functional connectivity among the ACC, insula, thalamus, and orbital frontal cortex only existed in the FD group. Conclusively, acupuncture alleviated defecation frequency and improved stool formation in FD patients. The efficacy might result from the regulation of the homeostasis afferent processing network. 1. Introduction Functional diarrhea (FD), one of the functional gastrointestinal disorders (FGID), is characterized by chronic diarrhea in the absence of structural or biochemical abnormalities that explain the symptoms [1]. According to the 2006 Rome III criteria, FD is defined as loose or watery stools without pain occurring in at least 75% of the stools [2]. The prevalence of FD ranges from 1.72% to 3.7% [3–5]. FD significantly influences the quality life of patients and consumes many healthcare resources [6]. Because of the unclear etiology and pathogenesis, the therapeutic options for FD are limited. As a result, complementary or alternative therapies are attractive to both patients and practitioners. Acupuncture, an important traditional Chinese medicine (TCM) therapy, has been used to treat gastrointestinal symptoms for centuries in China. Now it has been increasingly accepted as a complementary and alternative treatment for functional gastrointestinal disorders in western countries [7, 8]. ST25 (Tianshu), an important acupoint in the stomach meridian of the Foot Yangming, is commonly used to treat intestinal illnesses, such as
Properties of Phase Transformation of Ferroelectric Thin Films with Surface Layers  [PDF]
Lian Cui, Xu Xu, JiXin Che, Zelong He, Huijie Xue, Tianquan Lv
Journal of Modern Physics (JMP) , 2011, DOI: 10.4236/jmp.2011.29125
Abstract: Using the generalized Ginzburg-Landau-Devonshire theory, the characteristics of phase transformation of a ferroelectric thin film with surface layers are investigated. We study the effect of the surface layer on the properties (coercive field, critical thickness) of a ferroelectric thin film. Our theoretical results show that the surface layer is likely to answer for the emergence of phase transformation.
The evolutionary history of Cytochrome P450 genes in four filamentous Ascomycetes
Jixin Deng, Ignazio Carbone, Ralph A Dean
BMC Evolutionary Biology , 2007, DOI: 10.1186/1471-2148-7-30
Abstract: A total of 376 P450 genes were assigned to 168 families according to standard nomenclature. On average, only 1 to 2 genes per family were in each genome. To resolve conflicting results between different clustering analyses and standard family designation, a higher order relationship was formulated. 376 genes were clustered into 115 clans. Subsequently a novel approach based on parsimony was developed to build the evolutionary models. Based on these analyses, a core of 30 distinct clans of P450s was defined. The core clans experienced contraction in all four fungal lineages while new clans expanded in all with exception of NC. MG experienced more genes and clans gains compared to the other fungi. Parsimonious analyses unanimously supported one species topology for the four fungi.The four studied fungi exhibit unprecedented diversity in their P450omes in terms of coding sequence, intron-exon structures and genome locations, suggesting a complicated evolutionary history of P450s in filamentous Ascomycetes. Clan classification and a novel strategy were developed to study evolutionary history. Contraction of core clans and expansion of novel clans were identified. The exception was the NC lineage, which exhibited pure P450 gene loss.Fungi comprise a large and diverse kingdom of organisms. It is estimated that as many as 1.5 million species exist in the planet today [1,2]. Most described fungi grow by producing long, multi-celled hyphae, and are known as filamentous fungi. Filamentous fungi occupy a wide range of ecological niches with diverse life histories and physiological processes. Many live as saprotrophs decomposing and absorbing nutrients from dead materials while others have evolved the ability to be pathogens deriving their nutrients from living or dying hosts. Taking advantage of available genome sequences to explore the evolution of important gene families may help shed light on the processes that have allowed fungi to exploit diverse habitats.The P450-contain
Page 1 /32576
Display every page Item

Copyright © 2008-2017 Open Access Library. All rights reserved.