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HIGHLY INTERCONNECTED POROUS BIODEGRADABLE MICROTUBULAR SCAFFOLDS

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HIGHLY INTERCONNECTED POROUS BIODEGRADABLE MICROTUBULAR SCAF...

Study on the denoising method for the electromagnetic ultrasonic echoes from multiple interfaces

40th IUPAC Congress

作者： Fei Yang Hong Wan and Shenguo Wang* Institute of Chemistry chinese academy of {2.s beijing 100080 china

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chinese Journal of Acoustics 2008年第1期27卷 75-84页

作者： SONG Weihua WANG Xiaomin LI Mingxuan Institute of Acoustics Chinese Academg of Sciences Beijing 100080 Graduate School of the chinese academy of {2.s beijing 10002.

The electromagnetic ultrasound is used in the detection of interfaces of the adhesive multilayer structures to solve the unstable coupling problem in ultrasonic testing by traditional piezoelectric transducers. Based on the analysis of the transforming mechanism of electromag-netic ultrasound energy and the resultant dead zone from mutual inductance of the transducer, the wavelet filtering by soft-thresholding and adaptive noise canceling methods are used simul-taneously to the detected electromagnetic ultrasonic signals to overcome the drawbacks of the low signal to noise ratio （SNR） and the wide intrinsic dead zone of the transducer. Processed results in the interface detection of a three layered adhesive sample of steel and rubber materials demonstrate that the wavelet filtering enhances the SNR about 12.B while the adaptive noise canceling narrows the dead zone effectively.

关键词： Study on the denoising method for the electromagnetic ultrasonic echoes from multiple interfaces

Moduli Space of ⅡB Superstring and SUYM in AdS5×S~5

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Communications in Theoretical Physics 2006年第2期45卷 301-314页

作者： HOU Bo-Yu~1 HOU Bo-Yuan~2.WANG Xiao-Hui~1 XIONG Chuan-Hua~1 YUE Rui-Hong~11 Institute of Modern Physics,Northwest University,Xi’an 710069,china2.Graduate School,the chinese {2. of sciences,beijing 100039,china

This paper consists of two parts,In part Ⅰ,we interpret the hidden symmetry of the moduli space of IIBsuperstring on AdS×S~5 in terms of the chiral embedding in AdS,which turns out to be the CP~3 conformal anne *** review how the position μ of poles in the Riemann-Hilbert formulation of dressing transformation and thevalue of loop parameter μ in the vertex operator of aNne algebra determine the moduli space of the soliton solutions,which describes the moduli space of the Green-Sehwarz *** show also how this affine SU(4) symmetryaffinizes the conformal symmetry in the twistor space,and how a soliton string corresponds to a Robinson congruencewith twist and dilation spin coeNcients μ of *** part Ⅱ,by extending the dressing symmetric action of IIB stringin AdS×S~5 to the Dbrane,we find a gauged WZW action of Higgs Yang-Mills field including the 2.cocycle of *** left and right twistor structures of left and right α-planes glue into an *** symmetry groupof Nahm equations is centrally extended to an affine group,thus we explain why the spectral curve is given by affineToda.

关键词： AdS/CFT correspondence Green-Schwarz superst ring affine Toda

Multiple Equilibria in SSN Metabolic Module

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Multiple Equilibria in SSN Metabolic Module

On Finite-Time Stable Tracking Differentiator without Lipschitz Continuity of Lyapunov Function

第二十九届中国控制会议

作者： LEI Hong-Bo1,ZHANG Ji-Feng1,CHEN Luonan2.1.Key Laboratory of systems and Control,Institute of systems {2.,academy of mathematics and systems {2.,chinese academy of {2.s,beijing 100190,P.R.china2.Department of Electrical Engineering and Electronics,Osaka Sangyo University,Osaka 574-8530,Japan

In this paper,a novel modeling framework based on network modularization decomposition is proposed to analyze the multi-stability of metabolic *** first decompose a metabolic network into four types of elementary modules according to the special structures of metabolic systems,and then focus on one key type of these modules-the single substrate and single product with no inhibition(SSN)module,by deriving a nonlinear ordinary differential equation(ODE)model based on the Hill *** show that the injectivity of the vector field of the ODE model is equivalent to the nonsingularity of the Jacobian matrix of this vector field,which enables us equivalently to convert an unverifiable sufficient condition on the absence of multiple equilibria of an SSN module into a verifiable ***,we prove that this sufficient condition is held when the SSN module has both input and output *** a theoretical result not only provides a general framework for modeling an SSN metabolic module,but also implies that if a biological system can be exactly modeled by an SSN module,then it cannot admit multiple equilibria(or steady states).

关键词： Metabolic Network Multiple Equilibria SSN Module

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On Finite-Time Stable Tracking Differentiator without Lipsch...

Effects of quorum sensing autoinducer degradation gene on virulence and biofilm formation of Pseudomonas aeruginosa

第三十届中国控制会议

作者： GUO Bao-Zhu~(1,2.,ZHAO Zhi-Liang~2.1.The Key Laboratory of systems and Control,academy of {2. and systems science, Academia Sinica,beijing 100190,P.R.china 2.University of science and Technology of china,Hefei 32.02.,P.R.china

＜正＞In this paper,the strong and weak convergence of nonlinear flnite-time stable tracking differentiators is presented under some easy checkable conditions.A second order nonlinear differentiator is constructed by using homogeneity in geometry. Numerical simulation shows that this tracking differentiator has advantages compared with the existing *** application to the stabilization control of one-dimensional wave equation is illustrated *** result relaxes the strong condition required in[IEEE Transactions on Automatic Control,52.2.07）,1731-1737]that the Lyapunov function satisfies global Lipschitz condition,which seems very restrictive in applications.

关键词： Tracking differentiator Finite-time stability Homogeneity Stabilization Wave equation

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science china(Life sciences) 2007年第3期50卷 385-391页

作者： WANG Yao1, DAI Yue1,2. ZHANG Yong1,2. HU YangBo1,2. YANG BaoYu1 & CHEN ShiYun1 1 Wuhan Institute of Virology, chinese academy of {2.s, Wuhan 430071, china 2.Graduate University of chinese academy of {2.s, beijing 100049, china Wuhan Institute of Virology Chinese Academy of Sciences Wuhan 430071 China Wuhan Institute of Virology Chinese Academy of Sciences Wuhan 430071 China Graduate University of chinese academy of {2.s Beijing 100049 China

The aiiA gene from Bacillus thuringiensis was cloned into the Pseudomonas/E. coli shuttle vector and transformed into Pseudomonas aeruginosa strain PAO1. Western blotting showed that the AiiA protein was expressed in PAO1. After induction by IPTG for 6 h and 18 h, expression of the aiiA gene in PAO1 completely degraded the quorum sensing autoinducers N-acylhomoserine lactones (AHLs): N-oxododecanoyl-L-homoserine lactone (OdDHL) and N-butyryl-L-homoserine lactone (BHL). The re- duced amount of AHLs in PAO1 was also correlated with decreased expression and production of several virulence factors such as elastase and pyocyanin. AiiA expression also influenced bacterial swarming motility. Most importantly, our studies indicated that aiiA played significant roles in P. aeruginosa biofilm formation and dispersion, as observed by the differences of the biofilm formation on liquid and solid surfaces, and biofilm structures under a scanning electron microscope.

关键词： aiiA Effects of quorum sensing autoinducer degradation gene on virulence and biofilm formation of Pseudomonas aeruginosa gene

Application of Soliton Theory to the Construction of Isometric Immersions of M^(n_1) (c_1)×M^(n_2. (c_2. into Constant Curvature Spaces M^n (±1)

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Acta Mathematica Sinica,English Series 2002年第4期18卷 765-778页

作者： Jian Hua CHEN Department of mathematics. Peking University, beijing 100871. P. R. {2. Department, of mathematics, Armored Force Engineering Institute, beijing 100072. P. R. {2. Department of mathematics Peking University Beijing P. R. China Department of mathematics Armored Force Engineering Institute Beijing P. R. China

In this paper, we apply the soliton theory to the case of isometric immersion in differential geometry and obtain a family of isometric immersions from M^(n1) (c_1)×M^(n2.(c_2. to space forms M^n(c) by introducing 2.... 详细信息

关键词： Soliton theory Isometric immersion Riemaniann product

Formation and causes of NOx pollution on the east side of the Taihang Mountains in china

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science Bulletin 2011年第19期 2046-2051页

作者： TIAN HeZhong 1 , WANG Yan 1 , ZHAO Dan 1 , CHAI FaHe 2., XING ZiShan 3 & CHENG Ke 1 1 State Key Joint Laboratory of Environmental Simulation & Pollution Control, School of Environment, beijing Normal University, beijing 100875, {2. 2.chinese Research academy of Environmental sciences, beijing 100012. {2. 3 School of Computer science and Technology, beijing University of Posts and Telecommunications, beijing 100876, {2.

Tropospheric column amounts of NO 2.from OMI/Aura products were applied to investigate the seasonal variation of NO x on the east side of the Taihang Mountains (ESTM) in china. The NO 2.concentration varied seasonally, with winter maxima and summer minima. To explore the causes of the heavy NO 2.pollution in this region, wind field simulations were conducted by using the Fifth-Generation NCAR/Penn State Mesoscale Model (MM5). MM5 simulations showed that wind directions in the ESTM region were dominated by northeasterly and northwesterly winds throughout the year and to a lesser degree by southwesterlies. Elevated NO 2.concentrations (higher than 50×10 15 molec/cm 2.) occurred in three meteorological situations: convergent wind fields (5 days), northeasterly winds (2.days), and calm days (1 day) in January. Although the local anthropogenic NO x emission strength was not so high as that in other developed areas, the calms and frequent occurrence of convergent wind fields, as well as unfavorable terrains for diffusion, resulted in the accumulation of atmospheric pollutants and hence heavy NO x pollution. Furthermore, long-distance NO x transportation from the beijing-Tianjin-Tangshan region to the ESTM area could be seen when the wind was from a northeasterly direction, especially under high wind speeds.

关键词： east side of the Taihang Mountains (ESTM) remote sensing of air pollution satellite data tropospheric NO 2 pollution wind field china

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多主体服务组合的优化策略

计算机工程与应用 2004年第6期40卷 1-3页

作者：蒋运承史忠植中国科学院计算技术研究所

论文分析了目前多主体服务组合的研究现状和存在的问题,为了提高多主体服务组合的性能,研究了主体服务请求的分类方法。在服务请求分类的基础上,研究了多主体服务组合的优化策略,提出了等价优化策略、相似优化策略和互补优化策略等三种... 详细信息

论文分析了目前多主体服务组合的研究现状和存在的问题,为了提高多主体服务组合的性能,研究了主体服务请求的分类方法。在服务请求分类的基础上,研究了多主体服务组合的优化策略,提出了等价优化策略、相似优化策略和互补优化策略等三种优化策略,从理论上分析这些优化策略的性能特点,并用仿真实验验证了这些优化策略的有效性。

关键词：多主体系统多主体服务组合优化策略