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Search Results: 1 - 10 of 179180 matches for " 赵建涛 "
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二型模糊粗糙集
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控制与决策 , 2013,
Abstract: 基于二型模糊关系,研究二型模糊粗糙集.首先,在二型模糊近似空间中定义了二型模糊集的上近似和下近似;然后,研究二型模糊粗糙上下近似算子的基本性质,讨论二型模糊关系与二型模糊粗糙近似算子的特征联系;最后,给出二型模糊粗糙近似算子的公理化描述.
基于包含度的区间二型模糊粗糙集
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自动化学报 , 2013, DOI: 10.3724/SP.J.1004.2013.01714
Abstract: ?基于区间二型模糊包含度的公理化定义,给出了新的区间二型模糊包含度计算公式.进一步,通过包含度定义了区间二型模糊粗糙集,并讨论了它的一些基本性质.最后,利用区间二型模糊粗糙集研究了连续域决策信息系统的属性约简,给出了新的约简方法.实例说明了该约简方法的具体计算步骤,并且通过实验验证了该算法的有效性和可行性.
二型直觉模糊集
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控制理论与应用 , 2012,
Abstract: 二型模糊集和直觉模糊集都具有很强的实际应用背景.二型模糊集增强了系统处理不确定性的能力,直觉模糊集为解决人们判断问题所出现的犹豫信息提供了理论依据.本文在二型模糊集和直觉模糊集的基础上,给出了二型直觉模糊集的概念,证明了二型直觉模糊集是一型模糊集、直觉模糊集、区间值模糊集、区间值直觉模糊集的广义形式,讨论了二型直觉模糊集的基本运算和二型直觉模糊关系.最后,研究了基于二型直觉模糊理论的近似推理,并实例说明了二型直觉模糊集的实际应用背景.
原子蒸汽压与多普勒效应对量子相干气体光学特性的影响
Influence of Vapor Pressure and Doppler Effect on the Optical Property of a Coherent Atomic Vapor
 [PDF]

, 梅胜,
Applied Physics (APP) , 2013, DOI: 10.12677/APP.2013.31005
Abstract:

研究了在不同温度下三能级相干原子气体的光学特性(介电系数和群速)色散行为。求解三能级原子系统完备密度矩阵方程,得到所有密度矩阵元的色散行为,然后考虑多普勒频移修正和原子气体饱和蒸汽压(饱和密度)随着温度的变化关系,进行数值求解,给出了探针光群速的色散行为及与原子蒸汽温度的函数依赖关系图示。本文所研究的不同温度下三能级相干原子气体的光学特性可以作为某些温控光子学器件(如光子开关、光逻辑门、光子晶体管)的基本物理原理。

The dependence of dispersion characteristics of electric permittivity and group velocity on the temperature in a three-level quantum coherent atomic vapor is considered based on the numerical solution of the density matrix equation of the three-level atomic system. The behavior of dispersion of all the density matrix elements has been obtained, and both the Doppler frequency shift and the saturation density that depend upon the temperature of the saturated atomic vapor have been taken into account. The presented optical response of the quantum coherent vapor can be utilized as a fundamental mechanism for some temperature-controlled photonic devices such as optical switches, photonic logic gates and optical transistors.


 

近几十年来三江源地区水汽输送与 降水变化特征
Variation Characteristics of Water Vapor Transport and Precipitation in the Three Rivers’ Headstream Region during the Recent Several Decades
 [PDF]

曾小凡, ,, 周建中, 付必
Journal of Water Resources Research (JWRR) , 2014, DOI: 10.12677/JWRR.2014.32015
Abstract: 以三江源地区为研究区,采用该地区1971~2010年观测气象资料和NCEP/NCAR I再分析资料的逐日风场和比湿数据,分析了三江源地区近几十年来不同时间尺度上水汽输送及降水的时空特征和变化趋势。结果表明:1971~2010年,三江源地区水汽输送和降水的时空分布格局比较相似,但近几十年来水汽输送和降水的变化趋势并不一致。1971~2010年,三江源地区经向水汽输送呈显著减少趋势,主要是由于南边界水汽输入减少;纬向水汽输送呈显著增加趋势,主要是由于东边界水汽输出显著减少;区域边界总水汽收支变化趋势与经向水汽输送一致,呈显著减少;降水则呈一定的增加趋势,但未通过显著性检验。三江源地区特别是东南部近几十年来水汽输送显著减少,尤以6月和9月为甚,且水汽通量散度在中低层大气中辐合程度降低,但实测降水除9月明显减少外,其他月份并没有相应减少
Based on daily meteorological factors at observation stations and daily reanalysis data (including daily wind and daily specific humidity) of NCEP/NCAR I Reanalysis data during 1971-2010, temporal-spatial distributions and variation characteristics of water vapor transport and precipitation in the Three Rivers’ Headstream Region were analyzed. The results showed that the temporal-spatial distributions of water vapor transport and precipitation were similar in the Three Rivers’ Headstream Region, but that variation characteristics were different in recent several decades. During 1971-2010, meridional water vapor transport showed the dramatic decreasing trend due to the decrease of water vapor transport on southern boundary, and zonal water vapor transport showed the significantly increasing trend due to the decrease of water vapor transport on eastern boundary. Water vapor budget in the whole region had the same decreasing trend as the meridional water vapor transport, while precipitation had a certain increasing tendency without passing the significance testing. Water vapor transport decreased significantly in the Three Rivers’ Headstream Region especially in the
一段式小直径种植体在小缺牙间隙即刻修复种植的临床研究
,,刘琼,刘天
华西口腔医学杂志 , 2010, DOI: 10.3969/j.issn.1000-1182.2010.04.018
Abstract: 目的研究OsstemMS一段式小直径种植体用于5~6mm的缺牙间隙即刻修复种植的临床效果。方法在36例患者的36个5~6mm缺牙间隙处植入直径2.5mm或3.0mm的OsstemMS一段式小直径种植体36颗,即刻在椅旁或技工室完成树脂冠临时修复,树脂冠避开与对颌牙接触。术后3~5个月,金合金烤瓷冠完成修复。对所有病例进行定期的临床和放射线检查。结果36颗种植体行烤瓷冠修复时无1颗失败,其中1颗种植体植入后导致1颗邻牙牙髓坏死,经根管治疗后天然牙和种植体均成功保留。36例患者从种植体植入开始平均随访21.3个月(12~37个月),36颗种植体均获得成功,种植义齿龈缘与邻牙龈缘曲线协调,龈乳头充盈,美学效果理想。结论5~6mm缺牙间隙采用OsstemMS一段式小直径种植体即刻修复种植可以取得良好的临床效果。
Type-2 intuitionistic fuzzy sets
二型直觉模糊集

ZHAO Tao,XIAO Jian,
,

控制理论与应用 , 2012,
Abstract: Type-2 fuzzy sets and intuitionistic fuzzy sets have a wide range of practical applications. Type-2 fuzzy sets enhance the ability of the system for dealing with uncertainties. Intuitionistic fuzzy sets provide a theoretical basis to manage the hesitation information appearing to people in judging questions. In this paper, we introduce the concept of type-2 intuitionistic fuzzy sets under type-2 fuzzy sets and intuitionistic fuzzy sets. Furthermore, we prove that type-2 intuitionistic fuzzy sets are the generalized forms of type-1 fuzzy sets, intuitionistic fuzzy sets, interval-valued fuzzy sets and interval-valued intuitionistic fuzzy sets. The basic operations of type-2 intuitionistic fuzzy sets and type-2 intuitionistic fuzzy relations are discussed. Finally, the approximation reasoning based on the type-2 intuitionistic fuzzy theory is studied. A practical example illustrates the practical application background of type-2 intuitionistic fuzzy sets.
资源与环境遥感项目成果信息服务系统权限模型的设计与实现
刁明光,,,鹏举
国土资源遥感 , 2009, DOI: 10.6046/gtzyyg.2009.04.21
Abstract: 在Windows2003Server活动目录技术的基础上,基于传统的基于角色访问控制(RoleBasedAccessControl,RBAC)的思想,提出了一种基于活动目录角色的访问控制(ActiveDirectoryBasedKoleAccessControl,ADBRAC)模型。该模型在权限管理以及实现系统安全的策略中,通过对主体、客体和操作同时进行抽象,引入了用户组、视图及动作的概念,实现了细粒度的权限定义和功能权限管理,降低了管理复杂度。该模型已在资源与环境遥感项目成果信息服务系统的开发中得到实现。实践证明,模型简单实用,安全稳定,具有更强的通用性和表现现实世界的能力。
高分辨TerraSAR-X图像舰船目标几何参数提取方法
,拥军,,刘伟
控制与决策 , 2015, DOI: 10.13195/j.kzyjc.2014.0398
Abstract: 准确提取SAR图像舰船目标几何参数是实现舰船分类的基础.由于SAR特有的成像机理,SAR图像旁瓣效应和方位模糊严重影响了舰船目标的几何参数估计,为此提出一种基于迭代线性回归的舰船几何参数提取方法.首先通过线性回归提取目标的主轴方位;然后利用循环迭代剔除远离主轴的虚假目标像素;最后用实测SAR数据进行了验证.实验结果表明,该算法对高分辨率的SAR舰船目标切片具有较好的参数估计效果.
膨胀土填料分类指标体系的合理性验证
杨和平,湛文,肖杰,
公路交通科技 , 2012,
Abstract: 为进一步检验膨胀土填料分类指标体系的合理性,对在建广西百隆高速路上3种膨胀土系统开展了基本土性和各种强度、变形等路用性能试验,全面分析测试结果并对照新填料分类体系,3种土样均满足以改进CBR值、改进CBR膨胀量和稠度为指标的分级标准,都可直接用于下路堤填筑。据此,按物理处治技术原理并结合工程实施条件,采取粘土包边膨胀土夹层填芯方案,将性质最差的1号土分2阶段填筑于ZK176+135~+410路段,共消耗膨胀土60000m3,跟踪检测表明,路堤施工质量良好。通过系统试验和修建工程实体验证了膨胀土填料三指标分类体系的合理性。
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