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An effective connected dominating set based mobility management algorithm in MANETs

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2008年第10期9卷 1318-1325页

作者： Xin-yu WANG Xiao-hu YANG Jian-ling SUN Wei li Wei SHI shan-ping li School of Computer Science and Technology Zhejiang University Hangzhou 310027 China

This paper proposes a connected dominating set (CDS) based mobility management algorithm, CMMA, to solve the problems of node entering, exiting and movement in mobile ad hoc networks (MANETs), which ensures the connectivity and efficiency of the CDS. Compared with Wu's algorithm, the proposed algorithm can make full use of present network conditions and involves fewer nodes. Also it has better performance with regard to the approximation factor, message complexity, and time complexity.

关键词： Mobile ad hoc network (MANET) Connected dominating set (CDS) Mobility Dominator No-key dominator Approximation factor

In situ Elemental and Boron Isotopic Geochemistry of Tourmalines from Pegmatites in the Edanggang li-Be Deposit in the Quanji Massif， NW China

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Journal of Earth Science 2023年

作者： Xuan Zhou Tong Pan shan-ping li Qing-Feng Ding College of Earth Sciences， Jilin University Bureau of Geological Exploration & Development of Qinghai Province Qinghai Geological Survey Institute

The Edanggang area is characterized by small-scale li-Be-bearing granitic pegmatites in the Quanji Massif， northwest China. The genesis of these li-Be-bearing pegmatites remains unresolved. In this study， we use tourmalines as an indicator to constrain the genesis of them. In situ major and trace elements and boron isotopic compositions of tourmaline are analyzed. Two types of tourmalines are recongnized， i.e.， coarse-grained tourmaline (Tur 1) and fine tourmaline (Tur 2). Both types tourmalines share similar geochemical characteristics and are enriched in Fe， Na， and Al， but relatively depleted in Ca and Mg， with compositions close to alkali-group tourmaline and schorl. Petrography， chemical discrimination diagrams， and Al occupations in the Y-site suggest that the tourmalines are magmatic origin formed in the late stage of granitic pegmatite crystallization. Low V and Sr contents， and relatively high Co/Ni ratios of tourmalines are also in agreement with the above origin. The δ11B values of all tourmalines vary from -14.13‰ to -10.40‰， indicating the boron in the pegmatites was mainly derived from parental granitic pegmatite magma. The last-formed magmatic mineral assemblages of magmatic crystallizations in the Early Triassic might contribute to predominant li and Be reserves rather than the late external hydrothermal metasomatism.

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Rational Study Design is Important for Assessing Myocardial Protection of Anesthetics

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Chinese Medical Journal 2015年第22期128卷 3123-3124页

作者： Chao Sun Fu-shan Xue Rui-ping li Gao-Pu liu Department of Anesthesiology Plastic Surgery Hospital Chinese Academy of Medical Sciences and Peking Union Medical College Beijing 100144 China

To the Editor： In a single-center, prospective randomized clinical study including 122 elderly patients undergoing the carotid endarterectomy （CEA）, Wang et al. showed that compared with propofol-based total intravenous anesthesia, low-dose sevoflurane inhalation along with propofol reduced the incidence of postoperative myocardial injury.

关键词：癌胚抗原二异丙酚颈动脉内膜切除术麻醉静脉麻醉药醚类内皮缩血管肽类胰岛素老年人人类

甘肃旱区5个经济林树种的苗期抗旱性综合评价

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干旱地区农业研究 2017年第1期35卷 198-204,247页

作者：种培芳单立山苏世平李毅甘肃农业大学林学院甘肃兰州730070

以核桃、枣、枸杞、沙棘和花椒5个树种的2年生苗木为试材,通过盆栽试验,测定了干旱胁迫处理下5个树种叶片的质膜透性、根系活力、丙二醛、叶绿素及渗透调节物质含量、抗氧化物酶活性等10个相关指标,并采用隶属函数法和灰色关联度法评价... 详细信息

以核桃、枣、枸杞、沙棘和花椒5个树种的2年生苗木为试材,通过盆栽试验,测定了干旱胁迫处理下5个树种叶片的质膜透性、根系活力、丙二醛、叶绿素及渗透调节物质含量、抗氧化物酶活性等10个相关指标,并采用隶属函数法和灰色关联度法评价了5个树种的综合抗旱能力及各指标与树种抗旱性间的关系。结果表明:不同干旱处理下5个树种的抗旱性大小排列顺序不同,在对照处理下,核桃的隶属函数值最大,为0.5385,在重度胁迫下,则是花椒的最大,为0.5312。通过综合分析发现,5个树种的隶属函数值分别为花椒0.5610,核桃0.4992,枣0.4796,枸杞0.5028,沙棘0.5221,由此判断的5个树种抗旱性大小为:花椒>枸杞>沙棘>核桃>枣。在10个指标中,脯氨酸、膜透性、可溶性糖、可溶性蛋白、丙二醛和CAT 6项指标的关联度平均值可高达0.8562,可作为抗旱性鉴定的依据,而这6个指标代表的是渗透调节物质、酶活性系统和质膜过氧化3个体系,这些体系能充分反映5个经济林树种对干旱胁迫的适应性机制。

关键词：经济林抗旱性甘肃旱区综合评价

辊底式热处理炉钢板温度预报模型的研究及应用

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钢铁研究学报 2008年第4期20卷 30-33页

作者：单丽平王京李静北京科技大学高效轧制国家工程研究中心北京100083

为了提高辊底式热处理炉的钢板温度预报精度,采用了遗传神经网络的方法,运用大量的现场实际数据进行训练和仿真,建立了钢板温度预报模型,并将结果应用于计算辊底式热处理炉钢板温度的数学模型中。结果表明,所建立的模型简单、精度高,能... 详细信息

为了提高辊底式热处理炉的钢板温度预报精度,采用了遗传神经网络的方法,运用大量的现场实际数据进行训练和仿真,建立了钢板温度预报模型,并将结果应用于计算辊底式热处理炉钢板温度的数学模型中。结果表明,所建立的模型简单、精度高,能够满足在线应用的要求。

关键词：辊底式热处理炉温度预报遗传神经网络

辊底式热处理炉钢板温度预报模型的研究及应用

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钢铁研究学报 2008年第9期20卷 50-53页

作者：单丽平王京李静北京科技大学高效轧制国家工程研究中心北京100083

为了提高辊底式热处理炉的钢板温度预报精度,采用了遗传神经网络的方法,运用大量的现场实际数据进行训练和仿真,建立了钢板温度预报模型,并应用于计算辊底式热处理炉钢板温度的数学模型中。结果表明,所建立的模型简单、精度高,能够满足... 详细信息

为了提高辊底式热处理炉的钢板温度预报精度,采用了遗传神经网络的方法,运用大量的现场实际数据进行训练和仿真,建立了钢板温度预报模型,并应用于计算辊底式热处理炉钢板温度的数学模型中。结果表明,所建立的模型简单、精度高,能够满足在线应用的要求。

关键词：辊底式热处理炉温度预报遗传神经网络

Acute and chronic excitotoxicity in ischemic stroke and late-onset Alzheimer's disease

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Neural Regeneration Research 2025年第7期20卷 1981-1988页

作者： shan ping Yu Emily Choi Michael QJiang ling Wei Department of Anesthesiology Emory University School of MedicineAtlantaGAUSA Center for Visual and Neurocognitive Rehabilitation Atlanta Veterans Affairs Medical CenterDecaturGAUSA

Stroke and Alzheimer's disease are common neurological disorders and often occur in the same *** comorbidity of the two neurological disorders represents a grave health threat to older *** review presents a brief background of the development of novel concepts and their clinical *** activity of glutamatergic N-methyl-D-aspartate receptors and N-methyl-D-aspartate receptor-mediated Ca^(2+)influx is critical for neuronal *** ischemic insult induces prompt and excessive glutamate release and drastic increases of intracellular Ca^(2+)mainly via N-methyl-D-aspartate receptors,particularly of those at the extrasynaptic *** Ca^(2+)-evoked neuronal cell death in the ischemic core is dominated by necrosis within a few hours and days known as acute ***,mild but sustained Ca^(2+)increases under neurodegenerative conditions such as in the distant penumbra of the ischemic brain and early stages of Alzheimer's disease are not immediately toxic,but gradually set off deteriorating Ca^(2+)-dependent signals and neuronal cell loss mostly because of activation of programmed cell death *** on the Ca^(2+)hypothesis of Alzheimer's disease and recent advances,this Ca^(2+)-activated“silent”degenerative excitotoxicity evolves from years to decades and is recognized as a unique slow and chronic *** N-methyl-D-aspartate receptor subunit GluN3A,primarily at the extrasynaptic site,serves as a gatekeeper for the N-methyl-D-aspartate receptor activity and is neuroprotective against both acute and chronic *** stroke and Alzheimer's disease,therefore,share an N-methyl-D-aspartate receptor-and Ca^(2+)-mediated mechanism,although with much different time *** is thus proposed that early interventions to control Ca^(2+)homeostasis at the preclinical stage are pivotal for individuals who are susceptible to sporadic late-onset Alzheimer's disease and Alzheimer's disease-related

关键词： Ca^(2+)hypothesis cognitive deficits hyperactivity late-onset Alzheimer's disease neurodegeneration N-methyl-D-aspartate receptors N-methyl-D-aspartate receptor subunits pathogenesis preventive treatment

Effect of fiberoptic bronchoscope compared with direct laryngoscope on hemodynamic responses to orotracheal intubation

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Chinese Medical Journal 2007年第4期120卷 336-338页

作者： ZHANG Guo-hua XUE Fu-shan li ping SUN Hai-yan liU Kun-peng XU Ya-chao liU Yi SUN Hai-tao Department of Anesthesiology Plastic Surgery Hospital ChineseAcademy of Medical Sciences and Peking Union Medical CollegeBeijing 100041 China

Fiberoptic bronchoscope （FOB） is an important instrument for respiratory, disorder examination and difficult airway can avoid management. The fiberoptic intubation the mechanical stimulus to oropharyngolaryngeal structures thereby it is likely to attenuate hemodynamic responses during orotracheal intubation. However, the relevant studies showed conflicting results. In this study, we observed the hemodynamic responses to orotracheal intubation using an FOB and a direct laryngoscope （DLS） in healthy adults under general anesthesia to examine the efficacy of the FOB in attenuating the hemodynamic responses to orotracheal intubation.

关键词： fiberoptic bronchoscope general anesthesia orotracheal intubation hemodynamic responses

Synthesis of Steroidal lactone by Microtransformation from Dehydroepiandrosterone （DHEA）

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Synthesis of Steroidal lactone by Microtransformation from D...