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Search Results: 1 - 10 of 220566 matches for " Wang Li-Rong "
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Two-Parameter Inversion of Fluid-Saturated Porous Medium with Niche Ant Colony Algorithm
Xin-Ming Zhang,Li-Rong Wang
Mathematical Problems in Engineering , 2014, DOI: 10.1155/2014/164932
Abstract: Based on the Biot model, we performed the inversion of reservoir parameters with improved niche ant colony algorithms (INACA). In order to overcome the premature problem of inverse process, the improved niche ant colony algorithms are constructed by combining the fitness-sharing principle which is one of the niche methods with the ant colony algorithm. The numerical results indicate that the relative error of single parameter inversion can be maintained at less than 0.4 percent; particulary, the relative error of porosity is less than 0.02 percent. However, the inversion effect of two-parameter inversion was found to be slightly weak, but the relative error can still be maintained at less than 7.5 percent. Moreover, the antinoise property of the method was also verified. The results of numerical simulation demonstrate that the method is an effective convergent optimization method. 1. Introduction The fluid-saturated porous medium is viewed herein as a two-phase system consisting of a solid and a fluid phase, each of which is regarded as a continuum, and each is following its own motion. Biot [1, 2] first formulated linear governing equations for the interaction of two such phases in the 1950s. Compared with the classical single-phase elastic medium theory, the fluid-saturated porous medium wave equation is more complicated and in the model there are many coefficients which represent rock and flow properties. Therefore, the fluid-saturated porous medium theory describes the actual earth stratum more precisely and has much more trouble in parameter estimation process. According to the fact that the computed response should fit with the measured one, the parameter estimation can be reduced to solve an optimum problem. The traditional local optimum methods and iterative linear methods such as gradient method, perturbation method, and time convolution regularization iterative method are based on Newton iterative method; it is with local convergence. On the contrary, the global optimal methods, such as genetic algorithm, simulated annealing method, and ant colony algorithm, do not require more for the objective function in the general function optimization problems. Thus, global optimal methods have recently attracted the interest of numerous scholars. Meanwhile, as a newly developed global optimal method, the ant colony algorithm has also captured the interest of many scholars. The original ant colony algorithm was proposed by Colorni et al. [3] in 1991. This algorithm was an optimization methodology based on the foraging behavior of Argentine ants. In 1995,
The Analysis of the Best Quoting Strategy about the One-Level Sealed Bidding

ZHANG Li-rong,WANG Su-mei,

系统工程理论与实践 , 2005,
Abstract: 应用博弈论方法研究一级密封招标的最优报价策略,获得了投标人成本独立均匀分布时最优报价策略的函数式,证明了投标人的最优报价策略不仅仅依赖其自身的成本,还与参加竞争的投标人数量和他们的成本分布跨度相关.提出在一般情况下,每个招标项目的投标人数量应控制在6~9家,最多不允许超过12~15家.建议在法律法规上对每个招标项目的投标人数量给予规范或指导,避免投标人太少造成竞争不足或投标人太多造成社会资源浪费.
Li-rong Wen,Huai-yuan Xie,Shu-wen Wang
Acta Crystallographica Section E , 2009, DOI: 10.1107/s1600536809014792
Abstract: In the molecule of the title compound, C14H8Cl2N4S, all the ring atoms in the pyrazolopyrimidine system are almost coplanar, the largest deviation from the mean plane being 0.027 (2) for a C atom. The conformation of the methylsulfanyl group is antiperiplanar, with a torsion angle of 176.7 (2)°. A weak intermolecular C—H...N hydrogen bond and a Cl...N halogen bond [Cl...N = 3.196 (5) ] with a nearly linear N...Cl—C angle [174.2 (1)°] link the molecules into a two-dimensional assembly. Face-to-face π–π stacking, with a centroid–centroid separation of 3.557 (2) and an angle of 7.1 (1)° between the two planes, completes the intermolecular interactions in the solid state.
Existence and Uniqueness of Solution for Two Dimensional Extended Fisher-Kolmogorov Equation
MA Li-rong
Journal of Chongqing Normal University , 2010,
Abstract: Existence and uniqueness of solutions for equations is preliminary and foundation to study the behavior and property of solutions. The extended Fisher- Kolmogorov(EFK) equation plays an important role in the study of pattern formation in bi-stable systems, general genetics, the spread of liquid in the domain wall and traveling wave of reaction-diffusion system. In this paper, two-dimensional Extended Fisher-Kolmogorov(EFK) equation can be renormalized into ordinary differential equations by using Galerkin truncated method, and the existence and uniqueness of solutions for initial value problem of ordinary differential equations is proved. According to energy estimates of trucated solution in corresponding functional space, the convergence of truncated solution in corresponding functional space is given and the existence of weak solutions for two-dimensional Extended Fisher-Kolmogorov(EFK) equation is proved.Lastly, uniqueness for the weak solutions of two dimensional Extended Fisher-Kolmogorov(EFK) equation is derived in the condition that f (u) satisfies the Lipschitz conditions with repect to u .
Landscape ecological analysis of urban vegetation in Guangzhou, China
Guan Dong-sheng,WANG Li-rong,Li Zhen,
Guan Dong sheng
,Wang Li rong,Li Zhen

环境科学学报(英文版) , 1999,
Abstract: --The compositions, patches and landscape heteorogentity ofGuangzhou urban vegetation are studied by using the principles oflandscape ecology in this paper. The results showed that the areaof urban vegetation was 26901.4hm2, and the distribution ofvegetation types and regional vegetation coverage were uneven. Thepatch areas of vegetation were large in scenery vegetation andshelter vegetation, and small in street corner vegetation and smallgarden vegetation. Most of patches fell in range between 100 and10000 m2. Only 1.13% of patches were larger than 1000000 m2. Structure features of vegetation landscape in old urban ares weresmall patch, high scattering degree, high diversity, randomdistribution of vegetation patches and high heterogeneity. In newurban areas, the features were big patches, fine planning, mediumlandscape heterogeneity. At last, some suggestions are madeaccording to landscape character of Guangzhou urban vegetation.
Interleukin-11-induced capillary leak syndrome in primary hepatic carcinoma patients with thrombocytopenia
Wang Kai-Feng, Pan Hong-Ming, Lou Hai-Zhou, Shen Li-Rong, Zhu Xi-Yan
BMC Cancer , 2011, DOI: 10.1186/1471-2407-11-204
Abstract: We describe two cases of CLS after IL-11 administration in two males with thrombocytopenia. Case 1 was a 46-year-old man with recurrence of hepatic carcinoma who was treated with IL-11 (3 mg per day). After four days of therapy, hypotension and hypoproteinemia were detected. The chest X-ray and B ultrasound of the abdomen showed pleural effusion and ascites. IL-11 was then discontinued, fluid resuscitation was performed, and fresh frozen plasma and packed red blood cells were transfused into this patient. The patient had recovered after 19 days of treatment.Case 2 was a 66-year-old man who had undergone radiofrequency ablation (RFA) for hepatic carcinoma. He was treated with IL-11 (3 mg per day) for thrombocytopenia. After two days of therapy, this patient complained of dyspnea with bilateral edema of the hands. Laboratory values showed hypoproteinemia. IL-11 was stopped and human albumin was transfused at a rate of 10 g per day. On the 4th day, fluid resuscitation was performed. The patient had recovered after treatment for two weeks.The detection of IL-11-induced CLS supports the hypothesis that CLS could be a severe side effect of IL-11 treatment in some patients. These two case reports also demonstrate that patients with hepatic carcinoma who experience this rare form of CLS after treatment with IL-11 seem to respond to a therapeutic regimen that involves hydroxyethyl starch, albumin, and diuretic therapy. Liver cancer patients might be more susceptible to CLS because of poor liver function and hypersplenia. In addition, bleeding after RFA might be a further inducer of CLS.Capillary leak syndrome (CLS) is a rare clinical syndrome that was first described in 1960. In the vast majority of cases, it is characterized by acute episodes of generalized edema, hemoconcentration, and hypoproteinemia. The cause of CLS is unknown, and the condition is probably under recognized because of its nonspecific symptoms and signs and high mortality rate. Up to and including 1990,
Feature Mapping Based on PCA

GUO Wu,DAI Li-Rong,WANG Ren-Hua,

自动化学报 , 2008,
Abstract: In text-independent speaker verification research,feature mapping can reduce the bias by the channel.In this paper,the subspace of the channel is estimated by the generalized principal component analysis,then the bias of the channel is subtracted from the acoustic feature.The proposed algorithm requires labeled data in the training process but does not need the channel detection in the feature mapping process.In the NIST 2006 SRE lconv4w-lconv4w corpus, the equal error rate (EER) of the proposed system can be down by 19 % against the baseline Gaussian mixture model (GMM) system.
Speaker Verification Based on Factor Analysis and SVM

Guo Wu,Dai Li-rong,Wang Ren-hua,

电子与信息学报 , 2009,
Abstract: In the text-independent speaker recognition system, the mean-supervector of Gaussian Mixture Models (GMM) and Support Vector Machine (SVM) system can outperform the traditional GMM and Universal Background Models (UBM) system, but the session variability is still one of the most important reasons that deteriorate the performance. In this paper, the factor analysis is tailored to solve the session variability problem of GMM mean-supervector. The proposed algorithm can outperform the Nuisance Attribute Projection (NAP) algorithm. Furthermore, the proposed system based on factor analysis is more stable than the system based on NAP. In the NIST 2006 SRE corpus, the Equal Error Rate (EER) of the proposed system can obtain 6.0%.
RNAi-mediated silencing of CD147 inhibits tumor cell proliferation, invasion and increases chemosensitivity to cisplatin in SGC7901 cells in vitro
Bo Wang, Yong-Fei Xu, Bang-Shun He, Yu-Qin Pan, Li-Rong Zhang, Chan Zhu, Li-Li Qu, Shu-Kui Wang
Journal of Experimental & Clinical Cancer Research , 2010, DOI: 10.1186/1756-9966-29-61
Abstract: Short hairpin RNA (shRNA) expressing vectors targeting CD147 were constructed and transfected into human gastric cancer cells SGC7901 and CD147 expression was monitored by quantitative realtime RT-PCR and Western blot. Cell proliferation, the activities of MMP-2 and MMP-9, the invasive potential and chemosensitivity to cisplatin of SGC7901 cells were determined by MTT, gelatin zymography, Transwell invasion assay and MTT, respectively.Down-regulation of CD147 by RNAi approach led to decreased cell proliferation, MMP-2 and MMP-9 activities and invasive potential of SGC7901 cells as well as increased chemosensitivity to cisplatin.CD147 involves in proliferation, invasion and chemosensitivity of human gastric cancer cell line SGC7901, indicating that CD147 may be a promising therapeutic target for gastric cancer.Although the incidence and mortality of gastric cancer have fallen dramatically over the past 50 years [1], it remains the fourth most common cancer and the second leading cause of cancer-related death worldwide [2,3]. Gastric cancer traditionally carries a very poor prognosis because of late presentation at an advanced stage of disease and remains a great clinical challenge. Therefore, a better understanding of the molecular mechanisms underlying gastric cancer formation and progression should be helpful in developing more effective treatments for this disease.The metastatic process is dependent on the degradation of the extracellular matrix (ECM) both at primary tumor site and at secondary colonization site. Matrix metalloproteinases (MMPs), a family of zinc-dependent proteolytic enzymes, play a central role in the degradative process. High levels of MMPs have been frequently found at the tumor-stroma interface, most of which are expressed by stromal cells rather than by tumor cells themselves [4]. A search for MMP inducing factors in tumor cells led to the identification of CD147/EMMPRIN [5]. CD147 is a highly glycosylated cell surface transmembrane protein
Neuropeptide S Facilitates Mice Olfactory Function through Activation of Cognate Receptor-Expressing Neurons in the Olfactory Cortex
Yu-Feng Shao, Peng Zhao, Chao-Yu Dong, Jing Li, Xiang-Pan Kong, Hai-Liang Wang, Li-Rong Dai, Yi-Ping Hou
PLOS ONE , 2013, DOI: 10.1371/journal.pone.0062089
Abstract: Neuropeptide S (NPS) is a newly identified neuromodulator located in the brainstem and regulates various biological functions by selectively activating the NPS receptors (NPSR). High level expression of NPSR mRNA in the olfactory cortex suggests that NPS-NPSR system might be involved in the regulation of olfactory function. The present study was undertaken to investigate the effects of intracerebroventricular (i.c.v.) injection of NPS or co-injection of NPSR antagonist on the olfactory behaviors, food intake, and c-Fos expression in olfactory cortex in mice. In addition, dual-immunofluorescence was employed to identify NPS-induced Fos immunereactive (-ir) neurons that also bear NPSR. NPS (0.1–1 nmol) i.c.v. injection significantly reduced the latency to find the buried food, and increased olfactory differentiation of different odors and the total sniffing time spent in olfactory habituation/dishabituation tasks. NPS facilitated olfactory ability most at the dose of 0.5 nmol, which could be blocked by co-injection of 40 nmol NPSR antagonist [D-Val5]NPS. NPS administration dose-dependently inhibited food intake in fasted mice. Ex-vivo c-Fos and NPSR immunohistochemistry in the olfactory cortex revealed that, as compared with vehicle-treated mice, NPS markedly enhanced c-Fos expression in the anterior olfactory nucleus (AON), piriform cortex (Pir), ventral tenia tecta (VTT), the anterior cortical amygdaloid nucleus (ACo) and lateral entorhinal cortex (LEnt). The percentage of Fos-ir neurons that also express NPSR were 88.5% and 98.1% in the AON and Pir, respectively. The present findings demonstrated that NPS, via selective activation of the neurons bearing NPSR in the olfactory cortex, facilitates olfactory function in mice.
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