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Search Results: 1 - 10 of 104212 matches for " Qiaoyan Zhang "
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Automatic Construction Method for Domain Concepts Based on Wikipedia Semantic Knowledge Base  [PDF]
Qiaoyan Zhang, Min Lin, Shujun Zhang
Journal of Computer and Communications (JCC) , 2017, DOI: 10.4236/jcc.2017.51006
Abstract: This paper proposes a method to construct conceptual semantic knowledge base of software engineering domain based on Wikipedia. First, it takes the concept of SWEBOK V3 as the standard to extract the interpretation of the concept from the Wikipedia, and extracts the keywords as the concept of semantic; Second, through the conceptual semantic knowledge base, it is formed by the relationship between the hierarchical relationship concept and the other text interpretation concept in the Wikipedia. Finally, the semantic similarity between concepts is calculated by the random walk algorithm for the construction of the conceptual semantic knowledge base. The semantic similarity of knowledge base constructed by this method can reach more than 84%, and the effectiveness of the proposed method is verified.
Mechanical Properties of Plastic Concrete Containing Bentonite
Peng Zhang,Qiaoyan Guan,Qingfu Li
Research Journal of Applied Sciences, Engineering and Technology , 2013,
Abstract: Plastic concrete consists of aggregates, cement, water and bentonite, mixed at a high water cement ratio, to produce a ductile material. It is used for creating an impermeable barrier (cut-off wall) for containment of contaminated sites or seepage control in highly permeable dam foundations. The effects of water to binder ratio and clay dosage on mechanical properties of plastic concrete were investigated. The results indicate that the water to binder ratio and clay dosage have great influence on the mechanical properties of plastic concrete. There is a tendency of decrease in the compressive strength, splitting tensile strength, shear strength and elastic modulus of plastic concrete with the increase of water to binder ratio and clay dosage, while, the internal friction angle of the shear specimens is increasing gradually. To improve the resistance to deformation of cut-off walls constructed with plastic concrete, the higher water to binder ratio and clay dosage can be selected to decrease the elastic modulus of plastic concrete in the practical design and applications of plastic concrete on condition that the plastic concrete has enough compressive strength, tensile strength and shear strength.
Cryptanalysis and improvement of two certificateless three-party authenticated key agreement protocols
Haiyan Sun,Qiaoyan Wen,Hua Zhang,Zhengping Jin,Wenmin Li
Computer Science , 2013,
Abstract: Recently, two certificateless three-party authenticated key agreement protocols were proposed, and both protocols were claimed they can meet the desirable security properties including forward security, key compromise impersonation resistance and so on. Through cryptanalysis, we show that one neither meets forward security and key compromise impersonation resistance nor resists an attack by an adversary who knows all users' secret values, and the other cannot resist key compromise impersonation attack. Finally, we propose improved protocols to make up two original protocols' security weaknesses, respectively. Further security analysis shows that our improved protocols can remove such security weaknesses.
Maternal Treatment with Agonistic Autoantibodies against Type-1 Angiotensin II Receptor in Late Pregnancy Increases Apoptosis of Myocardial Cells and Myocardial Susceptibility to Ischemia-Reperfusion Injury in Offspring Rats
Zhu Jin, Wenhui Zhang, Hailiang Yang, Xiaofang Wang, Yanqian Zheng, Qiaoyan Zhang, Jianming Zhi
PLOS ONE , 2013, DOI: 10.1371/journal.pone.0080709
Abstract: Epidemiological studies have demonstrated that offspring born to mothers preeclampsia (PE) are at increased risk for developing cardiovascular diseases after birth, but the underlying mechanism is unknown. Angiotensin II receptor type 1 autoantibody (AT1-AA), an agonist acting via activation of the AT1 receptor, is believed to be involved in the pathogenesis of both PE and fetal growth restriction. The aim of the present study was to confirm the hypothesis that prenatal AT1-AA exposure increases the heart susceptibility to ischemia/reperfusion injury (IRI) in the offspring in an AT1-AA-induced animal model of PE, and determine whether or not the increase of maternal AT1-AA level is a factor contributing to sustained abnormalities of the heart structure during infancy. The hearts of 45-day-old offspring rats were studied using Langendorff preparation to determine the susceptibility of the heart to IRI. The results showed that the body weight of the maternal rats was not significantly different between the study and control groups, but the body weight of their offspring in AT1-AA group was decreased slightly at day 21 of gestational age, and at day 3 after birth. Although the heart weight index was not significantly affected at all ages examined, AT1-AA significantly increased the size of myocardial cells of the left ventricle (LV) at the age of 45 days. AT1-AA gained access to fetal circulation via the placenta and induced apoptosis of fetal myocardial cells. AT1-AA also significantly delayed recovery from IRI and affected the LV function of 45-day-old offspring. This was associated with a significant increase in IRI-induced LV myocardial infarct size. These results suggest that AT1-AA induced abnormal apoptosis of fetal myocardial cells during the fetal period and increased the cardiac susceptibility to IRI in adult offspring.
Comparative Effects of Er-Xian Decoction, Epimedium Herbs, and Icariin with Estrogen on Bone and Reproductive Tissue in Ovariectomized Rats
Liming Xue,Yin Wang,Yiping Jiang,Ting Han,Yan Nie,Lu Zhao,Qiaoyan Zhang,Luping Qin
Evidence-Based Complementary and Alternative Medicine , 2012, DOI: 10.1155/2012/241416
Abstract: Er-Xian Decoction (EXD), Epimedium herbs (herbs of Epimedium brevicornum Maxim, EBH), and icariin (ICA) have been proven to have estrogen-like and antiosteoporotic activity and are used for the treatment of osteoporosis, menopausal syndrome, and age-associated diseases. The present study found that EXD, EBH, and ICA treatments, emulating estrogen, significantly contributed to bone density and architecture in OVX rats and that EXD is similar to estrogen and exerts a concomitant effect on bone formation and bone resorption at the tissue level, while EBH and ICA produced bone-protective effects mainly by inhibiting bone resorption. Nevertheless, EXD, EBH, and ICA treatments manifested a fewer adverse effects on the uterus, mammary gland, and vagina compared to estrogen administrations. Among the EXD, EBH, and ICA, EXD was found to have superior efficacy and safety profile.
A 1HNMR-Based Metabonomics Study of Postmenopausal Osteoporosis and Intervention Effects of Er-Xian Decoction in Ovariectomized Rats
Liming Xue,Yin Wang,Lei Liu,Lu Zhao,Ting Han,Qiaoyan Zhang,Luping Qin
International Journal of Molecular Sciences , 2011, DOI: 10.3390/ijms12117635
Abstract: A metabonomics method using 1H nuclear magnetic resonance spectroscopy ( 1HNMR) was applied to obtain a systematic view of the development and progression of postmenopausal osteoporosis. Using partial least squares discriminant analysis (PLS-DA), 26 and 34 characteristic resonances were found respectively in urine and plasma of ovariectomized rats (Variable importance, VIP value ≥1.0), and the significant altered metabolites identified in the plasma and urine were 10 and 9, respectively. Changes in these metabolites were related to the pathways of lipid, energy and amino acid metabolism, some of which involved the oxidative system. The described method was also used to analyze the therapeutic effects of Er-Xian Decoction (EXD), a traditional Chinese medicine widely used in the clinical treatment of osteoporosis in China. The results showed that EXD administration could provide satisfactory effects on osteoporosis through partially regulating the perturbed pathways of lipid, energy and amino acid metabolism and improving the anti-oxidative ability.
ANALYSIS ON THE APPLICATION OF BACKGROUNDPARAMETERS IN REMOTE SENSING THEMATIC MAPPING
遥感专题制图背景参数的应用分析

FU Suxing,Zhang Chonghou,FU Qiaoyan,
傅肃性
,傅俏燕

地理研究 , 1998,
Abstract: 该重点论述了图像识别中背景参数的应用,包括图像信息的地学、生态特性与其制图对象、尺度的分析拟定;地物识别分类最佳时相图像的物候因的研究;专题制图图像波段优化组合分析以及地物识别的目的背景因素的辅助应用。该类背景参数与区域参数的应用研究一样,对空间图像数字专题制图的精度的根本改进与提高,具有重要的作用。
Effects and Interaction of Icariin, Curculigoside, and Berberine in Er-Xian Decoction, a Traditional Chinese Medicinal Formula, on Osteoclastic Bone Resorption
Liming Xue,Lei Jiao,Yin Wang,Yan Nie,Ting Han,Yiping Jiang,Khalid Rahman,Qiaoyan Zhang,Luping Qin
Evidence-Based Complementary and Alternative Medicine , 2012, DOI: 10.1155/2012/490843
Abstract: Er-Xian decoction (EXD), a traditional Chinese medicine, has been reported to have a protective effect against bone loss in ovariectomized osteoporotic rats, and the inclusion of icariin (I), curculigoside (C), and berberine (B) in EXD displays inhibitory effects on osteoclastic bone resorption. In the present paper, we investigated the interaction and effects of I, C, B, and their combination on bone resorption activity in vitro on osteoclasts derived from rat bone marrow cells. ICB synergistically decreased the formation of bone resorption pits, the number of multinucleated osteoclasts, and the activity of tartrate-resistant acid phosphatase (TRAP) and showed antagonistic or additive effects on cathepsin K activity in the coculture system of osteoblasts and bone marrow cells in the presence of 1, 25-dihydroxyvitamin D3 and dexamethasone. The combination of ICB also enhanced the inhibitory effects on the formation of F-actin ring, a cytoskeleton structure of osteoclasts induced from bone marrow cells with macrophage colony stimulation factor (M-CSF) and receptor activator of NF-κB ligand (RANKL). In addition, ICB synergistically improved the ratio of protein expression of osteoprotegerin (OPG) and RANKL in osteoblasts and interfered with the mitogen-activated protein kinases (MAPKs) pathway in osteoclast. These results clearly show that I, C, B, and their combination in EXD exert effects of mutual reinforcement. However, IBC does not show an intensified adverse effect in the ovariectomized murine model, as revealed by change in body and uterine weight, confirming the safety of EXD. These observations are in agreement with the rationality of the formula used in this paper.
Degradation of dissolved organic matter in landfill leachate during photocatalytic treatment process
光催化氧化降解垃圾渗滤液中溶解性有机物

Jia Chenzhong,Liu Song,Zhang Caixiang,Qin Qiaoyan,
贾陈忠
,刘松,张彩香,秦巧燕

环境工程学报 , 2013,
Abstract: The characteristic of dissolved organic matter (DOM) from landfill leachate was studied during UV-TiO2 photocatalytic degradation. The results showed that the removal rates of color, DOC and COD were up to 97%, 72% and 60%, respectively under optimum photocatalytic conditions. The outcomes of the UV spectrum indicated that the DOM of raw leachate contained a variety of macromolecular organic matters and polynuclear aromatic compounds with conjugated double bonds and carbonyl. After the photocatalytic treatment, the DOM of the effluents through different treatment periods had similar chemical structural units and functional groups. The results of FTIR spectrum suggested that the DOM of raw leachate contained large number of aromatic compounds with hydroxyl, carboxyl, amino groups and benzene rings, which were degraded effectively by photocatalysis. GC/MS results presented that the DOM of raw leachate had 72 sorts of organic compounds, including 25, 14 and 12 kinds of alcohols, carboxylic acids and ketones, respectively; while 44 sorts of organic compounds were detected in the effluents after 72 h treatment, including 12 kinds of esters, 16 kinds of alcohols, 8 kinds of ketones and none of carboxylic acids.
Trusted Mobile Client for Document Security in Mobile Office Automation
Xiaojun Yu,Qiaoyan Wen
International Journal of Information Technology and Computer Science , 2011,
Abstract: Mobile Office Automation is a popular application on the mobile platform. However, the mobile platform has no enough security protection in front of the open system, such as internet. The document security problem in this application has become a hot topic. This paper proposed a new solution to this problem. The solution based on the trusted computing technology, which implements the platform security by hardware. The solution also includes the transparent encryption technology that means application could run independent to the security module and keep the consistency of user experience. The trusted mobile client platform architecture and security functions process of the mobile document protection system are detailed. Related work also been introduced; the security analysis shows the proposed solution could provide well security enhancement for document protection in mobile platform.
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