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Search Results: 1 - 10 of 43965 matches for " Shuxing Wu "
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Low-Temperature Reverse Microemulsion Synthesis, Characterization, and Photocatalytic Performance of Nanocrystalline Titanium Dioxide
Zhang Liu,Zicong Jian,Jianzhang Fang,Xiaoxin Xu,Ximiao Zhu,Shuxing Wu
International Journal of Photoenergy , 2012, DOI: 10.1155/2012/702503
Abstract: Nanocrystalline titanium dioxide (TiO2) was synthesized in microemulsions by using cetyltrimethylammonium bromide (CTAB) as surfactant. In order to investigate the crystal transformation and photoactivity at low temperature, the as-prepared precipitates were aged at 65°C or calcined at various temperatures. Analyses using powder X-ray diffraction (XRD) and Fourier transform infrared microscopy (FT-IR) showed that precursors without aging or calcination were noncrystal and adsorbed by surfactant. After aging for 6 h, the amorphous TiO2 began to change into anatase. The obtained catalysts, which were synthesized in microemulsions with weight ratios of n-hexanol/CTAB/water as 6 : 3 : 1 and calcined at 500°C, presented the highest photocatalytic degradation rate on methyl orange (MO), while the catalysts, which were aged at 65°C for 90 h, also exhibited an outstanding photocatalytic performance and a little higher than that of the commercial titania photocatalyst Degussa P25.
DEVELOPMENT OF HIGH T_c SUPERCONDUCTING INFRARED BOLOMETERS
高温超导红外探测器的研制

CHEN JUXIN,SHI BAO''AN,ZHOU BING,WU RUJIA,HE WENLIAN,GONG SHUXING,
陈举新
,曹效能

红外与毫米波学报 , 1991,
Abstract: 用在两种衬底(SrTiO_3和LaAlO_3)上生长的YBa_2Cu_3O_(7-x)。薄膜制成高灵敏的热敏型高温超导红外探测器。经500K标准黑体的测量,在10Hz调制频率时,以SrTiO_3为衬底的器件,D~*(500,10,1)达8.2×10~8cm·Hz~(1/2)/W,NEP(500,10,1)达1.6×10~(10)W/Hz~(1/2);以LaAlO_3为衬底的器件,NEP(500,10,1)达10~(-11)W/Hz~(1/2)。还测量并分析了D~*和NEP随频率的变化和噪声频谱。
Influence of Thickness Variation on the Flapping Performance of Symmetric NACA Airfoils in Plunging Motion
Liangyu Zhao,Shuxing Yang
Mathematical Problems in Engineering , 2010, DOI: 10.1155/2010/675462
Abstract: In order to investigate the impact of airfoil thickness on flapping performance, the unsteady flow fields of a family of airfoils from an NACA0002 airfoil to an NACA0020 airfoil in a pure plunging motion and a series of altered NACA0012 airfoils in a pure plunging motion were simulated using computational fluid dynamics techniques. The “class function/shape function transformation“ parametric method was employed to decide the coordinates of these altered NACA0012 airfoils. Under specified plunging kinematics, it is observed that the increase of an airfoil thickness can reduce the leading edge vortex (LEV) in strength and delay the LEV shedding. The increase of the maximum thickness can enhance the time-averaged thrust coefficient and the propulsive efficiency without lift reduction. As the maximum thickness location moves towards the leading edge, the airfoil obtains a larger time-averaged thrust coefficient and a higher propulsive efficiency without changing the lift coefficient. 1. Introduction Since the Micro Air Vehicle (MAV) was generally defined by the Defense Advanced Research Projects Agency (DARPA) in 1997 [1], the Flapping Wing MAV (FWMAV) has been receiving more and more attention from military and civilian application domains. There is therefore an increasing interest to understand the aerodynamics of the flapping wing by experimental and numerical methods [2]. The first researchers who observed the unsteady flow dynamic characteristics of a flapping wing are Knoller [3] and Betz [4], and in the middle of 1930s, von Kármán and Burgers gave a theoretical explanation for the different patterns of a large-scale drag-indicative wake and a thrust-indicative wake [5]. It reinterested fluid scientists and biologists about two decades ago and now is a very active research area. Ellington gave a very comprehensive description of the insect hovering aerodynamics and unsteady aerodynamic effects were highlighted in these good series papers in 1984 [6]. Anderson et al. showed that oscillating foil could have a very high propulsive efficiency, as high as 87%, under specific conditions by water tunnel experiments [7]. Dickinson et al. demonstrated three distinct mechanisms, delayed stall, rotational circulation, and wake capture in enhanced aerodynamic performance of insects using a robotic fly apparatus [8]. To investigate the flow field and effects of flapping parameters on the thrust generation and the propulsive efficiency numerically, an unsteady panel method [9], and Navier-Stokes equations computations [10–15] have been employed during past decade,
Reliability and Validity of the CogState Battery Chinese Language Version in Schizophrenia
Na Zhong, Haifeng Jiang, Jin Wu, Hong Chen, Shuxing Lin, Yan Zhao, Jiang Du, Xiancang Ma, Ce Chen, Chengge Gao, Kenji Hashimoto, Min Zhao
PLOS ONE , 2013, DOI: 10.1371/journal.pone.0074258
Abstract: Background Cognitive impairment in patients with schizophrenia is a core symptom of this disease. The computerized CogState Battery (CSB) has been used to detect seven of the most common cognitive domains in schizophrenia. The aim of this study was to examine the reliability and validity of the Chinese version of the CSB (CSB-C), in Chinese patients with schizophrenia. Methodology/Principal Findings Sixty Chinese patients with schizophrenia and 58 age, sex, and education matched healthy controls were enrolled. All subjects completed the CSB-C and the Repeated Battery for the Assessment of Neuropsychological Status (RBANS). To examine the test-retest reliability of CSB-C, we tested 33 healthy controls twice, at a one month interval. The Cronbach α value of CSB-C in patients was 0.81. The test-retest correlation coefficients of the Two Back Task, Gronton Maze Learning Task, Social Emotional Cognition Task, and Continuous Paired Association Learning Task were between 0.39 and 0.62 (p<0.01) in healthy controls. The composite scores and all subscores for the CSB-C in patients were significantly (p<0.01) lower than those of healthy controls. Furthermore, composite scores for patients on the RBANS were also significantly lower than those of healthy controls. Interestingly, there was a positive correlation (r = 0.544, p<0.001) between the composite scores on CSB-C and RBANS for patients. Additionally, in the attention and memory cognitive domains, corresponding subsets from the two batteries correlated significantly (p<0.05). Moreover, factor analysis showed a two-factor model, consisting of speed, memory and reasoning. Conclusions/Significance The CSB-C shows good reliability and validity in measuring the broad cognitive domains of schizophrenia in affected Chinese patients. Therefore, the CSB-C can be used as a cognitive battery, to assess the therapeutic effects of potential cognitive-enhancing agents in this cohort.
The Weight Hierarchy of Some Reducible Cyclic Codes
Maosheng Xiong,Shuxing Li,Gennian Ge
Mathematics , 2015,
Abstract: The generalized Hamming weights (GHWs) of linear codes are fundamental parameters, the knowledge of which is of great interest in many applications. However, to determine the GHWs of linear codes is difficult in general. In this paper, we study the GHWs for a family of reducible cyclic codes and obtain the complete weight hierarchy in several cases. This is achieved by extending the idea of \cite{YLFL} into higher dimension and by employing some interesting combinatorial arguments. It shall be noted that these cyclic codes may have arbitrary number of nonzeroes.
On the Weight Distribution of Cyclic Codes with Niho Exponents
Shuxing Li,Tao Feng,Gennian Ge
Computer Science , 2014,
Abstract: Recently, there has been intensive research on the weight distributions of cyclic codes. In this paper, we compute the weight distributions of three classes of cyclic codes with Niho exponents. More specifically, we obtain two classes of binary three-weight and four-weight cyclic codes and a class of nonbinary four-weight cyclic codes. The weight distributions follow from the determination of value distributions of certain exponential sums. Several examples are presented to show that some of our codes are optimal and some have the best known parameters.
DOVIS: an implementation for high-throughput virtual screening using AutoDock
Shuxing Zhang, Kamal Kumar, Xiaohui Jiang, Anders Wallqvist, Jaques Reifman
BMC Bioinformatics , 2008, DOI: 10.1186/1471-2105-9-126
Abstract: We have developed an application termed DOVIS that uses AutoDock (version 3) as the docking engine and runs in parallel on a Linux cluster. DOVIS can efficiently dock large numbers (millions) of small molecules (ligands) to a receptor, screening 500 to 1,000 compounds per processor per day. Furthermore, in DOVIS, the docking session is fully integrated and automated in that the inputs are specified via a graphical user interface, the calculations are fully integrated with a Linux cluster queuing system for parallel processing, and the results can be visualized and queried.DOVIS removes most of the complexities and organizational problems associated with large-scale high-throughput virtual screening, and provides a convenient and efficient solution for AutoDock users to use this software in a Linux cluster platform.In the last several years, virtual screening has become an accepted tool in drug discovery. It has been successfully applied in a number of therapeutic programs, in particular, at the lead discovery stage, where high-throughput molecular docking can play an important role [1]. In concert with the continued need for improvements of in silico docking accuracies, the explosive growth of commercial and publicly available chemical databases requires computational techniques to efficiently implement docking protocols and rapidly screen millions of compounds in a timely fashion. Here, we are focusing on the techniques to enable large scale docking using Linux-based HPC platforms.Several commercial docking programs, such as Glide [2], LigandFit [3] and FlexX [4], can distribute docking jobs to computers over the network. However, protocols that can seamlessly dock millions of compounds and capture the top percentage of high-scoring ligands are not standard. There are two major requirements for such a protocol running on a Linux cluster: (1) the ability to launch parallel docking jobs through a queuing system; and (2) the ability to process millions of compounds in
A METHOD FOR MEASURING MODE I STRESS INTENSITY FACTOR WITH STRAIN GAGES
用电阻应变片测量应力强度因子方法的研究

YANG Shaoming,LI Shuxing,
杨韶明
,李树欣

实验力学 , 1998,
Abstract: A method for measuring the opening mode stress intensity factor K I with two strain gages is investigated, where the equation used for calculating the value of K I is derived from Williams stress asymptotic expansion. Comparison between the results obtained by the method and some known references shows that the method is feasible and may be applied to crack bodies with irregular geometry and complex loadings.
The Weight Distribution of a Class of Cyclic Codes Related to Hermitian Forms Graphs
Shuxing Li,Sihuang Hu,Tao Feng,Gennian Ge
Mathematics , 2012, DOI: 10.1109/TIT.2013.2242957
Abstract: The determination of weight distribution of cyclic codes involves evaluation of Gauss sums and exponential sums. Despite of some cases where a neat expression is available, the computation is generally rather complicated. In this note, we determine the weight distribution of a class of reducible cyclic codes whose dual codes may have arbitrarily many zeros. This goal is achieved by building an unexpected connection between the corresponding exponential sums and the spectrums of Hermitian forms graphs.
Difference Sets with Few Character Values
Tao Feng,Sihuang Hu,Shuxing Li,Gennian Ge
Mathematics , 2013, DOI: 10.1007/s10623-013-9830-7
Abstract: The known families of difference sets can be subdivided into three classes: difference sets with Singer parameters, cyclotomic difference sets, and difference sets with gcd$(v,n)>1$. It is remarkable that all the known difference sets with gcd$(v,n)>1$ have the so-called character divisibility property. In 1997, Jungnickel and Schmidt posed the problem of constructing difference sets with gcd$(v,n)>1$ that do not satisfy this property. In an attempt to attack this problem, we use difference sets with three nontrivial character values as candidates, and get some necessary conditions.
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