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Search Results: 1 - 10 of 82662 matches for " YANG Chun-xue "
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Implementation of an Ad Hoc Network Protocol E-OAODV Improving the Performance of TCP
一种提高TCP性能的移动自组网E-OAODV协议的实现

WU Chun-xue,YANG Chao-liang,
邬春学
,杨朝梁

计算机科学 , 2009,
Abstract: In order to improve the performance of TCP used in Ad Hoc networks,an enhanced routing protocol based on AODV was presented,which is called E-OAODV(Enhanced Optimal Ad Hoc On-demand Distant Vector)in this paper.By using routing information included in ACK returned from destination nodes,E-OAODV tries to transfer data to destination node while routing failures occurred.And at the same time,with modifications in both TCP and OAODV,E-OAODV tries its best to recover the lost data caused by routing failures.By N...
Research and Implementation of Multi-path Routing Protocol EMP-AOMDV
多路径路由协议EMP—AOMDV的研究与实现

WU Chun-xue,YANG Chao-liang,
邬春学
,杨朝梁

计算机科学 , 2009,
Abstract: In AODV routing protocol,an intermediate node can reply a RREQ when it has a route with a sequence number that is greater than or equal to that contained in the RREQ,no matter how many packets are waiting to send in it.These routes' performance may degrade because local congestions may incur on those nodes with the increase of offered load.To solve this problem,a multi-path routing methods MP-AOMDV had been optimized on the basis of AODV.This optimized protocol is called EMP-AOMDV (Enhanced Ad hoc On-demand...
Vapor-liquid equilibrium of coal liquefied oil fractions under high temperature and high pressure
高温高压下煤液化油气液平衡体系的研究

YANG Chun-xue,FENG Jie,
杨春雪
,冯杰

燃料化学学报 , 2009,
Abstract: In order to get the vapor-liquid equilibrium constants under the real liquefaction conditions, the data from the fractions of coal liquefied distillation oil and different gas, such as H2 and C2H6, were combined together to establish the coal liquefied oil flash distillation system through the process simulation software Aspen Plus. By using the flash-distillation system, the vapor-liquid equilibrium composition and distribution were calculated at reaction temperature and pressure. Also the rules of equilib...
Critical properties of lower temperature fractions of Shenhua coal liquefaction oil
神华煤液化油窄馏分的临界性质

YANG Chun-xue,FENG Jie,XU Ying,
杨春雪
,冯杰,徐英

燃料化学学报 , 2008,
Abstract: 引入AspenPlus软件,用COAL-LIQ模块计算得到神华煤液化油300℃以前8个窄馏分的临界温度、临界压力、临界体积.同时利用MXXC基团贡献法,以GC-MS数据为基准对8个馏分的临界性质进行验证计算.结果表明,计算结果与利用化学结构法测定的基本一致.随馏出温度的提高,馏分临界温度逐渐升高,临界压力先升高再降低,临界体积先减小后增大,转折点出现在180℃~200℃馏分段.通过对化合物的结构分析表明,馏分中大量极性化合物的富集是造成计算数据点转折及跳跃的原因.为验证两种计算方法的一致性,引入斯米尔切诺夫统计检验法进行分析.结果表明,两种方法计算结果的总体分布函数在95%的置信区间内一致,表明对于计算临界性质,AspenPlus计算方法可以代替基团贡献法估算法.此外,Aspen软件计算简便,其结果可为煤液化反应器的放大及过程优化直接引用.
Improving Fishpond Sediment by Aquatic Vegetable Rotation
Ling Tao,Chun-Xue Zhang,Jian-Qiang Zhu,Shi-Yang Zhang
Advance Journal of Food Science and Technology , 2012,
Abstract: Continuously intensive fish farming results in pond degradation that needs to be improved. Therefore, the experiment rotating intensive fish culture with two aquatic vegetables lotus (Nelumbo nucifera) and water chestnuts (Eleocharis dulcis) cultivation is conducted aiming at determining the effect of rotation as a sediment management technique on improving the pond sediment and assessing the food safety risk of the vegetables cultivated in the pond sediment from the aspects of heavy metal. The results showed that after rotation, the content of Total Nitrogen (TN) and Organic Matter (OM) in the upper 10 cm sediment decreased significantly (p<0.05), with TN content reduced 1.05 and 0.74 g/kg; OM content reduced 0.59 and 0.37%, respectively. The contents of Organic-Phosphorus (OP) and Fe/Al-bound Phosphorus (Fe/Al-P) in the sediment decreased significantly (p<0.05), with OP reduced 0.05 and 0.04 g/kg, Fe/Al-P reduced 0.19 and 0.15 g/kg, respectively. The heavy metal contents of As, Pb, Cd, Hg, Cr and Zn except Cu in the pond sediment were under Chinese National II Soil Criterion and the contents of As, Pb, Cd, Hg, Cr, Cu and Zn in edible vegetable rhizomes satisfied Safety Requirements for Non-environmental Pollution Vegetable. Rotation of fish culture with aquatic vegetables cultivation effectively mitigated excessive nutrient load in the sediment while recycled the nutrient in the sediment to produce safe vegetables. It could be considered as a viable sediment quality improving technique.
2,8-Dimesitylboranyl-6H,12H-5,11-methanodibenzo[b,f][1,5]diazocine
Chun-Xue Yuan
Acta Crystallographica Section E , 2012, DOI: 10.1107/s1600536811051051
Abstract: In the title compound, C51H56B2N2, a substituted Tr ger's base, the dihedral angle between the two benzene rings constituting the Tr ger's base framework is 104.42 (6)°. The crystal structure is stabilized by C—H...π and weak C—H...N interactions.
The Field Emission Characteristics of Titanium-Doped Nano-Diamonds

YANG Yan-Ning,ZHANG Zhi-Yong,ZHANG Fu-Chun,DONG Jun-Tang,ZHAO Wu,ZHAI Chun-Xue,ZHANG Wei-Hu,

中国物理快报 , 2012,
Abstract:
Temperature dependence of field emission of nano-diamond
纳米金刚石的变温场发射

Yang Yan-Ning,Zhang Zhi-Yong,Zhang Fu-Chun,Zhang Wei-Hu,Yan Jun-Feng,Zhai Chun-Xue,
杨延宁
,张志勇,张富春,张威虎,闫军锋,翟春雪

物理学报 , 2010,
Abstract: The field emission characteristics of nano-diamond deposited on titanium substrate at various temperatures are studied.It was found that the emission current increases with increase of temperature and electric field,while the stability of the emission current basically does not change.The field emission characteristic deviates from classic Fowler-Nordheim theory.The mechanism of the emission current at different temperatures is analyzed.It may be due to the combined action of scale effect of the nano-diamon...
Temperature dependence of field emission of nano-diamond
纳米金刚石的变温场发射

Yang Yan-Ning,Zhang Zhi-Yong,Zhang Fu-Chun,Zhang Wei-Hu,Yan Jun-Feng,Zhai Chun-Xue,
杨延宁
,张志勇,张富春,张威虎,闫军锋,翟春雪

中国物理 B , 2010,
Abstract: 研究了温度变化对沉积在钛基底上的纳米金刚石的场发射特性的影响,发现纳米金刚石场发射电流随温度和电场的升高而增大,场发射特性偏离了传统的Fowler-Nordheim理论,场发射电流的稳定性基本没有变化.分析了场发射电流增大的机理,表明是由于纳米金刚石的尺度效应以及外电场下金刚石产生了大量的热载流子共同作用的结果.研究还表明基底钛在温度升高到一定程度后,在外加电场下会有较大的电流产生,对场发射造成较大的影响,表明基底钛具有一定的温度敏感性和电压敏感性.
夜间喂养终止时间对婴幼儿生长发育的影响
Effects of end time of night feeding on the growth and development of infants/toddlers

徐胜媛, 李馨, 郑春雪, 王文美, 杨田田, 吴燕焱, 王以新
XU Sheng-Yuan
, LI Xin, ZHENG Chun-Xue, WANG Wen-Mei, YANG Tian-Tian, WU Yan-Yan, WANG Yi-Xin

- , 2018, DOI: 10.7499/j.issn.1008-8830.2018.10.011
Abstract:
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