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Trust Measuring Model Based on Social Factors of Users and their Behavior
基于用户及其行为社会属性的信任测度模型

LU You,HUA Ze,SHENG Hao,XI Xue-feng,<br> ,华 泽,盛 浩,奚雪峰
计算机科学 , 2013,
Abstract: Trust measure is the basis of trust mechanism. Now the trust mechanism is facing the threat that malicious users manipulate the reputation. I}he trust measure model based on the social factors of users and their behavior expands the traditional trust mechanism. It describes and analyses the characters of malicious users and their behavior by the social factor,which reflects the essential of user and behavior. This model also adds the audit process in order to correct the reputation under the attack, so it can guarantee the credibility of trust measure in distributed Environment. Simulation experiments show that this model can effectively react to the reputation manipulation attack by the malicious users.
基于用户及其行为社会属性的信任测度模型
,华 泽,盛 浩,奚雪峰?
计算机科学 , 2013,
Abstract: 信任测度是信任机制的核心和基础,现有的信任机制面临着恶意用户操纵信誉的安全威胁。基于用户及其行为社会属性的信任测度模型对传统的信任机制进行了扩充,引入用户及其行为所映射的本质特性即社会属性来描述和分析恶意用户及其行为的特征,在信任测度过程中增加信誉评审过程来修正对信任测度的攻击,从而保证了分布式环境中的信任测度的可信性。模拟实验表明,该信任测度模型能有效地应对恶意用户对信誉的操纵攻击。
Relationships between antioxidant activities and heat-resistant features of two Laminaria japonica strains
不同海带品系抗氧化系统活性与耐热性的相关性研究

WANG You,Tang Xuexi,<br>王,唐学玺
应用生态学报 , 2005,
Abstract: The study on the relationships between antioxidant activities and heat-resistant features of two Laminaria japonica gametophyte mutants Kelp 901(abbreviated as 901)and Rongcheng No.1(abbreviated as RC)under different temperature conditions showed that under normal temperature condition(10 ),there were no positive relationships between the basal antioxidant activities and heat-resistant features of 901 and RC,while under heat stress(18 ),the reactive oxygen species(ROS)contents kept constant in 901,but accumulated rapidly in RC,suggesting that ROS played an essential role in oxidative stress.The enzyme activities in RC were more vulnerable to high temperature,and its antioxidant enzyme activities decreased more sharply under heat stress.Ascorbic acid(ASA),vitamin E,superoxide dismutase(SOD)and glutathione peroxidase(Gpx)might play important roles in kelp's heat-resistance.Chlorophyll a was sensitive to heat stress,and its 50% nocuity time could be used as an indicator to distinguish kelp strains with different heat-resistance.It was suggested that the antioxidant system's responses to heat stress instead of its basic activities accounted for the kelp's heat-resistance.
Determination of Chlorimuron Ethyl Wettable Powder (WP)in Technical Product and Formulation by Reversed-Phase High Performance Liquid Chromatography (RP-HPLC)
反相高效液相色谱法测定豆黄隆可湿性粉剂

He Youqi,Huang Xinjiang,<br>何,黄信江
色谱 , 1996,
Abstract: 反相高效液相色谱法测定豆黄隆可湿性粉剂何悠崎,黄信江(黑龙江省农垦生物调节剂实验厂佳木斯154007)1前言豆黄隆(chlorimuronethyl)是一种新型高效豆田除草剂,可进行土壤或茎叶处理,对豆田某些顽固性杂草有特效,对大豆安全性随叶节增加而...
一种面向增删操作的粗糙集属性约简更新算法
,华泽,奚雪峰,张妮,吴宏杰
南京师范大学学报(自然科学版) , 2015,
Abstract: 属性约简是粗糙集理论的核心内容之一,在信息系统的对象信息不断出现增删等更新操作的环境下,如何进行快速有效的属性约简则是一个亟需解决的迫切问题.提出一种面向增删操作的属性约简更新算法,面向更新前后的决策表,首先分析了对象信息动态增加与删除情况下信息熵的变化机制以及约简属性对新增或删除对象的区分情况,然后提出基于区分情况的新条件熵值的计算方法,最后给出基于散列表的属性约简更新算法.实验结果证明,本文方法可以快速求解出增删更新后的属性约简结果,其性能较传统方法有较大优势.
面向网络状态的自适应用户行为评估方法
1,2罗军舟1,李伟1,于枫1,夏怒1
通信学报 , 2013,
Abstract: ?用户复杂的行为往往会导致网络状态出现波动,破坏网络平稳运行,由于指标及权重的主观性和静态性,传统评估方法难以准确衡量用户行为对网络状态变化的影响程度。因此引入粗糙集理论,构建一种面向网络状态的自适应用户行为评估方法,使用属性约简和属性重要度方法对用户行为和网络状态数据进行挖掘,分析用户行为与网络状态变化的关联程度,以此自适应构建评估指标及权重,并随用户行为变化而动态调整,从而准确地量化用户行为对网络状态变化的影响程度。实验结果表明,该评估方法有助于准确发现造成网络状态变化的用户及其行为,能够为加强对用户行为的管控提供有效支持。
Vegetation-Erosion Process in Semiarid Region:Ⅲ.Application
半干旱区植被风沙动力过程耦合研究: Ⅲ. 应用

CHEN You,LI Zhen-shan,WANG Yi,<br>陈 ,李振山,王 怡
中国沙漠 , 2009,
Abstract: 以科尔沁地区的奈曼旗为例对植被-风沙动力耦合模型进行实际应用,模拟10余年来生物量和风蚀量的分布变化,并与遥感数据进行对比.对奈曼地区1987年至2002年土壤水分补给量、生物量和风蚀量的模拟结果表明:土壤水分补给量与降水量有较明显的相关性,通常春夏土壤水分补给量较高、秋冬季较低.土壤水分补给量与降水量在空间分布上较为一致,地势低洼处比周边地区高.生物量的季节变化规律主要表现为夏季最高;秋季若雨水充足可形成一个次高峰,若降雨量较小则生物量迅速下降;冬季和初春生物量最低.生物量的空间分布格局为南部、地势低洼以及离河流较近的区域生物量较高.风蚀量的季节变化规律表现为初春季最高,夏季最低,秋季逐步上升,上升的速度视生物量情况而变化,冬季较稳定.风蚀量的空间分布格局是北部平原地区和植被覆盖较低的地区风蚀量较高.
Vegetation-Erosion Process in Semiarid Region:Ⅱ.Simulation
半干旱区植被风沙动力过程耦合研究:Ⅱ. 模拟

WANG Yi,LI Zhen-shan,CHEN You,<br>王怡,李振山,
中国沙漠 , 2009,
Abstract: 以我国北方半干旱区典型自然条件为模型输入参数,对生物量和风蚀量的动态变化和空间分布进行了模拟.模拟的主要影响因素有降水量、气温、土壤类型和风况等.模拟结果表明:生物量随着降水量的增加和气温的升高而增大,风蚀量随着大风日数和风速的增加而增大.随着半干旱区降水和气温的季节变化,生物量在初春最低、夏末最高;风蚀量则在春季最大、夏季最小.生物量和风蚀量有明显的相互影响,生物量的增加能够有效降低风蚀量.在不受其他因素影响时,生物量与降水量在空间上的分布呈现出一致性,在考虑气温因素后生物量的重心向气温较高处偏移.小幅度的地形变化对生物总量和风蚀总量的大小影响不大,但明显改变了它们的空间分布格局.
BIOLOGICAL STRATEGIES IN CONTROLLING OR MITIGATING MARINE HARMFUL ALGAL BLOOMS (HABS)
海洋有害赤潮的生物防治对策

WANG You,YU Zhi-ming,<br>王,俞志明
植物生态学报 , 2005,
Abstract: This paper provides a review of some biological control or mitigation strategies for HABs, a problem worldwide in coastal waters. Bacteria, viruses and parasites are abundant in marine ecosystems and their abilities for rapid replication and host-specificity make them attractive HAB controlling agents; however, potential ecological impacts need to be taken into account. Species interactions between bloom microalgae and other algae play essential roles in affecting the phytoplankton sequence either by competing for the available nutrient supply or by secreting extracellular organic substances (allelopathy) into the environmental medium. This control strategy is not well understood due to a lack of experimental data, especially under natural conditions. Grazing of phytoplankton by zooplankton and suspension-feeding benthos is also considered a promising control agent, but this approach has many logistical problems and is a long way from the application stage. Collectively, some of the biological strategies discussed are decades from possible implementation, but others are further developed and thus worth considering in the immediate future.
Studies on damage of membrane lipid peroxidation and deesterification caused by ozone treatment in Laminaria japonica
臭氧处理对海带膜脂过氧化和脱酯化伤害研究

ZHANG Peiyu,TANG Xuexi,WANG You,<br>张培玉,唐学玺,
环境科学学报 , 2003,
Abstract: Changes in photosynthesis rates,membrane relative permeability,H_2O_2 content,membrane lipid peroxidation and deesterification in Laminaria japonica under ozone treatment were studied by ecotoxicological and biochemical method.The results showed that the photosynthesis rates decreased with the ozone treatment intensity increment in Laminaria 901 and Laminaria No.1.Membrane relative permeability and H_2O_2 content increased,phospholipid content decreased and free fatty acid content promoted in microsomal membrane.These meant that membrane damage was seriously induced by ozone treatment and the increase in membrane damage was relatied to the accumulation of active oxygens which initiated deesterification.However,malondiadehyde(MDA) content in Laminria 901,not only in homogenate but also in microsomal membrane,did not show significant changes,while MDA content of microsomal membrane in Laminaria No.1 exhibited obvious changes.The results suggested that the membrane damage induced with ozone treatment was due to membrane lipid deesterification in Laminaria 901,and both membrane lipid deesterification and peroxidation in Laminarina No.1.
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