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Communications in Theoretical Physics 2006年第2X期46卷 193-198页

作者： LI De-sheng luo Cheng-Xin College of Mathematics and Systems Science Shenyang Normal University Shenyang 110034 China

In this paper, we improve the method for deriving Jacobi elliptic function solutions of nonlinear evolution equations given in Ref. [12] and apply it to the integrable higher-order Broer-Kaup system in （2＋1）-dimens... 详细信息

关键词： Jacobi elliptic function projective Riccati equation higher-order Broer-Kaup system exact solutions

Receptivity of hypersonic boundary layer due to fast-slow acoustics interaction

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Acta Mechanica Sinica 2015年第6期31卷 899-909页

作者： Jun Gao Ji-sheng luo Xue-Song Wu Department of Mechanics Tianjin University Department of Mathematics Imperial College London

The objective of receptivity is to investigate the mechanisms by which external disturbances generate unsta- ble waves. In hypersonic boundary layers, a new receptivity process is revealed, which is that fast and slow acoustics through nonlinear interaction can excite the second mode near the lower-branch of the second mode. They can generate a sum-frequency disturbance though nonlinear interaction, which can excite the second mode. This receptivity process is generated by the nonlinear interaction and the nonparal- lel nature of the boundary layer. The receptivity coefficient is sensitive to the wavenumber difference between the sumfrequency disturbance and the lower-branch second mode. When the wavenumber difference is zero, the receptivity coefficient is maximum. The receptivity coefficient decreases with the increase of the wavenumber difference. It is also found that the evolution of the sum-frequency disturbance grows linearly in the beginning. It indicates that the forced term generated by the sum-frequency disturbance resonates with the second mode.

关键词： Hypersonic boundary layer · Receptivity·Nonlinear interaction · Acoustic

Effects of H pylori therapy on erythrocytic and iron parameters in iron deficiency anemia patients with H pylori-positive chronic gastristis

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World Journal of Gastroenterology 2007年第40期13卷 5380-5383页

作者： Lun-Hua Chen He-sheng luo Department of Hematology Renmin Hospital ofWuhan University Wuhan 430060 Hubei Province China Department Of Gastroenterology RenminHospital of Wuhan University Wuhan 430060 Hubei ProvinceChina

AIM： To elucidate the influences of Hpylori infection on oral iron treatment for iron deficiency anemia （IDA）.METHODS： A total of 86 patients were divided into two groups： group A, receiving ferrous succinate combined with triple therapy for H pylori eradication, and group B （control）, treated with ferrous succinate only. During treatment of IDA, dynamic changes in hemoglobin （Hb） level, mean corpuscular volume （MCV）, mean corpuscular hemoglobin （MCH）, serum iron （SI）, and serum ferritin （SF） were compared between the groups.RESULTS： Hb was slightly higher in group A at d 14 alter the start of triple therapy for H pylori eradication （P 〉 0.05）. After the therapy, the increase of Hb in group A became significantly faster than that in group B （P 〈 0.05）. At d 56, the mean Hb in group A returned to the normal level, however, in group B, it was lower than that in group A （P 〈 0.05） although it had also increased compared with that before oral iron treatment. The MCV and MCH in group A recovered to the normal level, and were much higher than those in group B （P 〈 0.05） at d 21. In Group B, the MCV and MCH remained at lower than normal levels until d 42 alter the start of therapy. And then, they reached a plateau in both groups and the differences disappeared （P 〉 0.05）. The SF in group A was higher than that in group B （P 〈 0.05） 28 d alter the treatment and its improvement was quicker in group A （P 〈 0.05）, and the difference between the two groups was even more significant （P 〈 0.01） at d 56. The SI in group A was higher than that in group B （P 〈 0.05） at d 14 and this persisted until d 56 when the follow-up of this research was finished.CONCLUSION： Treatment of H pylori can enhance the efficacy of ferrous succinate therapy in IDA patients with Hpylori-positive chronic gastritis.

关键词： H pylori Iron deficiency anemia Oral irontreatment Chronic gastritis

Mode decomposition of nonlinear eigenvalue problems and application in flow stability

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Applied Mathematics and Mechanics(English Edition) 2014年第6期35卷 667-674页

作者：高军罗纪生 Department of Mechanics Tianjin University

Direct numerical simulations are carried out with different disturbance forms introduced into the inlet of a flat plate boundary layer with the Mach number 4.5. According to the biorthogonal eigenfunction system of the linearized Navier-Stokes equations and the adjoint equations, the decomposition of the direct numerical simulation results into the discrete normal mode is easily realized. The decomposition coefficients can be solved by doing the inner product between the numerical results and the eigenfunctions of the adjoint equations. For the quadratic polynomial eigenvalue problem, the inner product operator is given in a simple form, and it is extended to an Nth-degree polynomial eigenvalue problem. The examples illustrate that the simplified mode decomposition is available to analyze direct numerical simulation results.

关键词： nonlinear eigenvalue problem mode decomposition spatial mode adjoint equation orthogonal relationship

Responses of HFR-LWC beams under close-range blast loadings accompanying membrane action

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Defence Technology（防务技术） 2020年第6期16卷 1167-1187页

作者： Wan-xiang Chen Li-sheng luo Zhi-kun Guo Peng Yuan School of Civil Engineering Sun Yat-Sen UniversityZhuhai519082China State Key Laboratory of Disaster Prevention&Mitigation of Explosion&Impact Army Engineering University of PLANanjing210007China Southern Marine Science and Engineering Guangdong Laboratory Zhuhai519082China

The load-carrying capacities and failure patterns of reinforced concrete components can be significantly changed by membrane ***,limited work has been carried out to investigate the blast resistance of Hybrid Fiber Reinforced Lightweight Aggregate Concrete(HFR-LWC)members accompanying membrane *** paper presents a theoretical approach to quantitatively depicting the membrane behavior and its contribution on the behavior of HFR-LWC beams under close-range blast loadings,and the suitability of the proposed model is validated by a series of field *** improved Single-Degree-of-Freedom(SDOF)model was employed to describe the dynamic responses of beam-like members under blast loadings accompanying membrane action,where the mass-load coefficient is determined according to the nonuniformly distributed load induced by close-range explosion,and the membrane action is characterized by an in-plane(longitudinal)force and a resisting *** elastoplastic and recovery responses of HFR-LWC beams under the combined action of blast load and membrane force were analyzed by the promoted model.A specially built end-constrain clamp was developed to provide membrane action for the beam member when they are subjected to blast load *** is demonstrated that the analytical displacement-time histories are in good agreement with experimental results before peak deflections and that the improved SDOF model is an acceptable tool for predicting the behavior of HFR-LWC beams under blast loadings accompanying membrane action.

关键词： Blast load Membrane action HFR-LWC beam Dynamic response Experimental study

Survivin and p53 expression in primary and recurrent pterygium in Chinese patients

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International Journal of Ophthalmology(English edition) 2011年第4期4卷 388-392页

作者： Li-Wei Zhang, luo-sheng Tang Department of Ophthalmology the Second Xiangya Hospital of Central South University Changsha 410011 Hunan Province China Department of Ophthalmology Shenzhen People's Hospital Shenzhen 518033 Guangdong Province China

AIM: To assess the expression of anti-apoptotic protein survivin and tumor suppressor p53 protein in primary and recurrent pterygium and to investigate the relationship between them. METHODS: Survivin was assessed immunohistochemically using rabbit polyclonal antibody and p53 using mouse monoclonal antibody in a study sample of 20 cases of primary pterygium, 10 cases of recurrent pterygium and 10 cases of normal conjunctiva. RESULTS: In our study, 35% of primary (7 of 20) and 40% of recurrent (4 of 10) pterygium specimens were positive for survivin staining; 45% of primary (9 of 20) and 50% of recurrent (5 of 10) pterygium specimens were positive for p53 expression; and all normal conjunctiva showed no staining of either survivin or p53. The p53 and survivin immunoreactivity in primary and recurrent pterygium groups was greater than those in normal conjunctiva group (P0.05). The expression of survivin clearly segregated with p53-positive pterygium as compared with p53-negative cases [8 of 14 cases (57.1%) vs ersus 3 of 16 cases (15.2%)]. The Fisher's exact test analysis confirmed a highly statistically significant correlation between survivin and p53 expression (P <0.05). CONCLUSION: The survivin and p53 are overerpressed with correlation between them in primary and recurrent pterygium.

关键词： pterygium survivin p53

A Posterior Error Analysis for the Nonconforming Discretization of Stokes Eigenvalue Problem

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Acta Mathematica Sinica,English Series 2014年第6期30卷 949-967页

作者： Shang Hui JIA Fu sheng luo He Hu XIE School of Statistic and Mathematics Central University of Finance and Economics The Third Institute of Oceanography SOA LSEC Academy of Mathematics and Systems Science Chinese Academy of Sciences

In this paper, we present a posteriori error estimator for the nonconforming finite element approximation, including using Crouzeix–Raviart element and extended Crouzeix–Raviart element, of the Stokes eigenvalue problem. With the technique of Helmholtz decomposition, we first give out a posteriori error estimator and prove it as the global upper bound and local lower bound of the approximation error. Then, by deleting a jump term in the indicator, another simpler but equivalent indicator is obtained. Some numerical experiments are provided to verify our analysis.

关键词： A posteriori error estimate adaptive finite element method nonconforming Stokes eigen-value problem

Jet formation in shock-heavy gas bubble interaction

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Acta Mechanica Sinica 2013年第1期29卷 24-35页

作者： Zhi-Gang Zhai Ting Si Li-Yong Zou Xi-sheng luo Department of Modern Mechanics University of Science and Technology of China National Key Laboratory of Shock Wave and Detonation Physics Institute of Fluid Physics CAEP

The influences of the acoustic impedance and shock strength on the jet formation in shock-heavy gas bubble interaction are numerically studied in this work. The process of a shock interacting with a krypton or a SF6 bubble is studied by the numerical method VAS2D. As a validation, the experiments of a SF6 bubble accelerated by a planar shock were performed. The results indicate that, due to the mismatch of acoustic impedance, the way of jet formation in heavy gas bubble with different species is diversified under the same initial condition. With respect to the same bubble, the manner of jet formation is also distinctly different under different shock strengths. The disparities of the acoustic impedance result in different effects of shock focusing in the bubble, and different behaviors of shock wave inside and outside the bubble. The analyses of the wave pattern and the pressure variation indicate that the jet formation is closely associated with the pressure perturbation. Moreover, the analy- sis of the vorticity deposition, and comparisons of circulation and baroclinic torque show that the baroclinic vorticity also contributes to the jet formation. It is concluded that the pres- sure perturbation and baroclinic vorticity deposition are the two dominant factors for the jet formation in shock-heavy gas bubble interaction.

关键词： Shock-bubble interaction - Heavy gas bubble Acoustic impedance Jet

Recent advances in phenothiazine-based dyes for dye-sensitized solar cells

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Chinese Chemical Letters 2016年第8期27卷 1304-1318页

作者： Jun-sheng luo Zhong-Quan Wan Chun-Yang Jia State Key Laboratory of Electronic Thin Films and Integrated Devices School of Microelectronics and Solid-State ElectronicsUniversity of Electronic Science and Technology of China

Dye-sensitized solar cells（DSSCs） have attracted significant attention as alternatives to conventional silicon-based solar cells owing to their low-cost production,facile fabrication,excellent stability and high power conversion efficiency（PCE）.The dye molecule is one of the key components in DSSCs since it significant influence on the PCE,charge separation,light-harvesting,as well as the device *** various dyes,easily tunable phenothiazine-based dyes hold a large proportion and achieve impressive photovoltaic *** class of dyes not only has superiorly non-planar butterfly structure but also possesses excellent electron donating ability and large π conjugated *** review summarized recent developments in the phenothiazine dyes,including small molecule phenothiazine dyes,polymer phenothiazine dyes and phenothiazine dyes for co-sensitization,especially focused on the developments and design concepts of small molecule phenothiazine dyes,as well as the correlation between molecular structures and the photovoltaic performances.

关键词： Dye-sensitized solar cells Molecular engineering Small molecule phenothiazine dyes Polymer phenothiazine dyes Co-sensitization Power conversion efficiency

SVM based layout retargeting for fast and regularized inverse lithography

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Journal of Zhejiang University-Science C(Computers and Electronics) 2014年第5期15卷 390-400页

作者： Kai-sheng luo Zheng SHI Xiao-lang YAN Zhen GENG Institute of VLSI Design Zhejiang University

Inverse lithography technology(ILT),also known as pixel-based optical proximity correction(PB-OPC),has shown promising capability in pushing the current 193 nm lithography to its *** treating the mask optimization process as an inverse problem in lithography,ILT provides a more complete exploration of the solution space and better pattern fidelity than the traditional edge-based ***,the existing methods of ILT are extremely time-consuming due to the slow convergence of the optimization *** address this issue,in this paper we propose a support vector machine(SVM)based layout retargeting method for ILT,which is designed to generate a good initial input mask for the optimization process and promote the convergence *** by optimized masks of training layouts generated by conventional ILT,SVM models are learned and used to predict the initial pixel values in the‘undefined areas’of the new *** this process,an initial input mask close to the final optimized mask of the new layout is generated,which reduces iterations needed in the following optimization *** is another critical issue in ILT;however,the mask generated by our layout retargeting method is quite irregular due to the prediction inaccuracy of the SVM *** compensate for this drawback,a spatial filter is employed to regularize the retargeted mask for complexity *** implemented our layout retargeting method with a regularized level-set based ILT(LSB-ILT)algorithm under partially coherent illumination *** results show that with an initial input mask generated by our layout retargeting method,the number of iterations needed in the optimization process and runtime of the whole process in ILT are reduced by 70.8%and 69.0%,respectively.

关键词： Inverse lithography technology Optical proximity correction Layout retargeting Support vector machine