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Search Results: 1 - 10 of 119433 matches for " Guangxi Wang "
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Power law and small world properties in a comparison of traffic city networks
Ke Ma,ZhongWen Wang,Jian Jiang,GuangXi Zhu,Wei Li
Chinese Science Bulletin , 2011, DOI: 10.1007/s11434-011-4769-4
Abstract: We analyze the statistical properties of the urban public bus networks of two cities (Beijing and Chengdu) in China. To this end, we present a comprehensive survey of the degree distribution, average path length, and clustering of both networks. It is shown that both networks exhibit small world behavior and are hierarchically organized. We also discuss the differences between the statistical properties displayed by the two networks. In addition, we propose a weight distribution approach to study the passenger flow through the public bus networks we considered. A hierarchical structure is observed here also.
Strong charge and spin fluctuations in La$_2$O$_3$Fe$_2$Se$_2$
Guangxi Jin,Yilin Wang,Xi Dai,Xinguo Ren,Lixin He
Physics , 2015,
Abstract: The electronic structure and magnetic properties of the strongly correlated material La$_2$O$_3$Fe$_2$Se$_2$ are studied by using both the density function theory plus $U$ (DFT+$U$) method and the DFT plus Gutzwiller (DFT+G) variational method. The ground-state magnetic structure of this material obtained with DFT+$U$ is consistent with recent experiments, but its band gap is significantly overestimated by DFT+$U$, even with a small Hubbard $U$ value. In contrast, the DFT+G method yields a band gap of 0.1 - 0.2 eV, in excellent agreement with experiment. Detailed analysis shows that the electronic and magnetic properties of of La$_2$O$_3$Fe$_2$Se$_2$ are strongly affected by charge and spin fluctuations which are missing in the DFT+$U$ method.
Preparation of Colloidal Gold Immunochromatographic Strip for Detection of Paragonimiasis skrjabini
Ying Wang, Lifang Wang, Jianwei Zhang, Guangxi Wang, Wenbi Chen, Lin Chen, Xilin Zhang
PLOS ONE , 2014, DOI: 10.1371/journal.pone.0092034
Abstract: Background Paragonimiasis is a food-borne trematodiasis, a serious public health issue and a neglected tropical disease. Paragonimus skrjabini is a unique species found in China. Unlike paragonimiasis westermani, it is nearly impossible to make a definitive diagnosis for paragonimiasis skrjabini by finding eggs in sputum or feces. Immunodiagnosis is the best choice to detect paragonimiasis skrjabini. There is an urgent need to develop a novel, rapid and simple immunoassay for large-scale screening patients in endemic areas. Methodology/Principal Findings To develop a rapid, simple immunodiagnostic assay for paragonimiasis, rabbit anti-human IgG was conjugated to colloidal gold particles and used to detect antibodies in the sera of paragonimiasis patients. The synthesis and identification of colloidal gold particles and antibody-colloidal gold conjugates were performed. The size of colloidal gold particles was examined using a transmission electron microscope (TEM). The average diameter of colloidal gold particles was 17.46 nm with a range of 14.32–21.80 nm according to the TEM images. The formation of antibody-colloidal gold conjugates was monitored by UV/Vis spectroscopy. Excretory-secretory (ES) antigen of Paragonimus skrjabini was coated on nitrocellulose membrane as the capture line. Recombinant Staphylococcus protein A was used to prepare the control line. This rapid gold immunochromatographic strip was assembled in regular sequence through different accessories sticked on PVC board. The relative sensitivity and specificity of the strip was 94.4% (51/54) and 94.1% (32/34) respectively using ELISA as the standard method. Its stability and reproducibility were quite excellent after storage of the strip at 4°C for 6 months. Conclusions/Significance Immunochromatographic strip prepared in this study can be used in a rapid one-step immunochromatographic assay, which is instantaneous and convenient.
A SCHEME OF CONFERENCE CONNECTION SUPPORTED BY CLOS NETWORKS
Clos网的一种会议型连接方案

Wang Xiaohui,Zhu Yaoting,Zhu Guangxi,
王晓晖
,朱耀庭,朱光喜

电子与信息学报 , 2000,
Abstract: 本文提出了一种Clos网的会议型连接方案。该方案假定在点对点Clos网引导后,会议网端口以模块为单位分配给不同会议,证明了在此条件下实现广义会议非重整无阻塞和会议独立选路需要最少的中间模块支持,即m≥3。同时指出本方案具有会议成员无阻塞特性和会议不相关特性,并具有灵活性、稳定性及时延方面的优点。
Evaluation of Decompressed Image Quality
解压缩图象质量的客观评价研究

Wang Xiaohui,Zhu Yaoting,Zhu Guangxi,
王晓晖
,朱耀庭

中国图象图形学报 , 1999,
Abstract: The disadvantage of PSNR, the most common objective measure to evaluate the decompressed images, is pointed out. A new measure named DSNR (Detail SignalNoise Ratio) is therefore proposed. DSNR can be calculated by abstracting energy of detail signal and noise. Using DSNR, the quality of decompressed images can be directly measured without the original (uncompressed) images. Our experiments show that DSNR of different images in the same scene changes congruously with PSNR, thus can be used to evaluate the quality of decompressed images and image sequences.
A Scalable Coding Scheme for Videoconference Complied with H.263 Recommendation
一种与H.263建议兼容的会议电视分层编码方案

Wang Xiaohui,Zhu Guangxi,Zhu Yaoting,
王晓晖
,朱光喜

中国图象图形学报 , 1998,
Abstract: Based on the schototics analysis of the two kinds of DCT coefficients, a scalable coding scheme complied with H.263 recommendation is proposed. This scheme is independent on the hardware and can be implemented easily and quickly, sending successive video signal within dynamically changeable bandwidth. Therefore it is suitable for the videoconference system running on the computer network.
Enhancement of Oral Bioavailability of Puerarin by Polybutylcyanoacrylate Nanoparticles
Lixia Zhao,Anchang Liu,Min Sun,Jinsong Gu,Haigang Wang,Shuang Wang,Jing Zhang,Chenyu Guo,Rui Duan,Guangxi Zhai
Journal of Nanomaterials , 2011, DOI: 10.1155/2011/126562
Abstract: The interest using novel drug delivery systems to improve oral bioavailability of drug with poor solubility is increasing. In this study, a new oral delivery system, polybutylcyanoacrylate nanoparticles (PBCNs), was introduced to improve the oral bioavailability of puerarin (PUE). PUE-loaded PBCN was successfully prepared by anionic polymerization method. Characterization of PUE-loaded PBCN was evaluated with morphology, size, zeta potential, and in vitro release study. The PBCN loading PUE exhibited a spherical shape under transmission electron microscopy with an average size of 159.4?nm, and the zeta potential was ?15.0?mV. The in vitro release of PUE-loaded PBCN showed an initial burst release followed by a sustained release. Physicochemical state of PUE in PBCN was investigated by differential scanning colorimetry, X-ray diffraction, and Fourier transform infrared spectroscopy. The results indicated that PUE in PBCN was in a noncrystalline state. The oral pharmacokinetic study in rats showed that the relative bioavailability of PUE-encapsulated PBCN to the crude PUE was more than 550%. It can be concluded that PBCN as an oral drug carrier can significantly improve the oral bioavailability of PUE. 1. Introduction The bioavailability is an important parameter showing the degree and rate of drug molecules entering blood circulation, indicating the effectiveness and safety of an extravascular administration formulation. It can be influenced by drug formulations, food, and physiological factors. However, up to 50% of orally administered drugs present formulation problems related to poor solubility (0.011?M) [1]. In recent years, many specific pharmaceutical approaches such as micro- and nanotechnology have been developed to improve the bioavailability [2]. As one promising delivery system with improved bioavailability, polybutylcyanoacrylate nanoparticles (PBCNs) have attracted considerable attention [3]. It is a type of solid colloidal particles ranging in size from 10?nm to 1000?nm made of biodegradable polymers [4, 5] which could significantly enhance the oral absorption of some drugs such as thymopentin [6]. The PBCNs that served as the oral carriers can prevent the destruction of drugs (e.g., peptide drugs) by the acid and enzymes in gastrointestinal tract [7, 8], improve the drug absorption through Peyer’s patches (PP), the immunization-related tissue in small intestine of human and animals which accounts for about 25% of the intestinal mucosa, and other intestinal lymphoid tissue into the blood circulation [9], and prolong the residence time in
Empowering Ubiquitous Services in Next-generation Smart Homes
Ge Xiaohu,Zhu Guangxi
Information Technology Journal , 2006,
Abstract: This study proposes an architecture which integrates ad-hoc network and OSGi framework to support the ubiquitous services in next-generation smart home. The new architecture includes three-level network entities, each of which has its own capability and infrastructure. In order to realize information communication in the new architecture, a new model of protocols stack has been designed. As a result, a solution of ubiquitous services in smart home has been described in this study.
Variation in characteristics of rare and threatened plants after ex-situ conservation
石山稀有濒危植物在迁地保护后的性状变异

HUANG Shi Xun,LI Rui Tang,LUO Wen Hua,ZHOU Tai Jiu,TANG Wen Xiu,WANG Yan Guangxi Institute of Botany,Chinese Academy of Sciences,Guilin,Guangxi,
黄仕训
,李瑞棠,骆文华,周太久,唐文秀,王燕

生物多样性 , 2001,
Abstract: We compared morphological characters, phenology and chemical elemental contents of seven threatened plant species in limestone soil with those in acid red soil. The results show that the following variations occurred after the plants had been introduced to acid soil : 1) the leaves became larger and thinner, and the seeds and leaf shape of some species changed; 2) the flowering, fruit bearing and leaf falling was delayed one week;3) the chemical content of N, Zn, B and Al increased as much as 20%, but Ca decreased by 10%, though much higher than those in acid soil ; 5) the K, B absorbencies of the plants in limestone soil were about 10%;4) the content of Ca decreased, but was still much higher than the plants in acid soil. The content of Al higher than those in acid soil, but the absorbencies of other elements (N, P, Ca, Mg, Fe, Al, Mn and Zn) were lower than those in acid soil.
Acute Kidney Injury in ADPKD Patients with Pneumonia
Carlos Franco Palacios,Mira T. Keddis,Dingxin Qin,Ladan Zand,Guangxi Li,Xiangling Wang,Rodrigo Cartin-Ceba,Robert P. Hartman,Qi Qian
International Journal of Nephrology , 2011, DOI: 10.4061/2011/617904
Abstract: Background. In animal models, polycystic kidneys are susceptible to acute kidney injury (AKI). We examined the occurrence of AKI in a cohort of autosomal dominant polycystic kidney disease (ADPKD) and non-ADPKD patients with acute pneumonia. Design. All ADPKD patients admitted to Mayo Clinic Rochester for pneumonia from January 1990 to April 2010 were examined. Sixty-three patients had lobar infiltration and consolidation on chest X-ray. After excluding patients on dialysis, with organ transplantation, and on chronic immunosuppression, 24 remaining ADPKD patients were enrolled. Twenty-three of the 24 were matched with 92 (1?:?4 ratio) non-ADPKD pneumonia patients based on their baseline eGFR. AKI was defined as serum creatinine elevation ≥0.3?mg/dL. Results. Sixteen of the 23 ADPKD patients (69.6%) and 36 of the 92 (39.1%) non-ADPKD patients developed AKI, . In both groups, those who developed AKI had a lower baseline eGFR ( versus in ADPKD and versus ?mL/min/1.73?m2 in the non-ADPKD group), more intensive care unit admissions, and longer hospital stays. AKI was associated with a reduced survival in both groups. Conclusions. Patients with ADPKD admitted for acute pneumonia had more frequent episodes of AKI than non-ADPKD patients with comparable kidney function. 1. Introduction Acute kidney injury (AKI) occurs in 7–18% of all hospitalized patients [1] and is an independent predictor of mortality [2]. Risk factors for the development of AKI include infection, sepsis, medication toxicity, intravenous contrast administration, and major surgeries. Patients with underlying kidney disease are more susceptible to AKI in the setting of infection [3]. Autosomal dominant polycystic kidney disease (ADPKD) is a common, inherited disease, characterized by formation of kidney cysts due to renal tubular dilatation, leading to cystic kidney enlargement and kidney failure in more than half of the affected patients by age 50–70 [4]. Kidney tubules in ADPKD exhibit features of dedifferentiation with elevated rates of proliferation and apoptosis at baseline [5, 6]. In orthologous polycystic kidney mouse models, cystic kidneys exhibit an increased susceptibility to AKI induced by ischemic-reperfusion injury, with changes seen as early as 48 hours after the insult [7–9]. Whether humans with ADPKD have the same increased susceptibility to AKI as the animal models of ADPKD is unknown. Acute pneumonia, mild or severe, has been shown to cause AKI in a fraction of patients, leading to an increased in-hospital and one-year mortality [10, 11]. In this study, we examined the
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