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Search Results: 1 - 10 of 44374 matches for " 一致变化的尾部 "
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复合更新风险模型中负相依索赔额下的精细大偏差
宋立新,冯敬海,袁亮亮
应用概率统计 , 2015,
Abstract: 本文考虑了在复合更新风险模型当中,负相依索赔额情形下与之相关的精细大偏差的若干问题.文中假设是一列负相依的随机变量,其对应分布列为,并假定的右尾分布等同于某个具有一致变化尾的分布.根据所得的结果试图建立与经典大偏差相似的结论,并将其应用到改进后的复合更新风险模型当中.
不锈钢化学着色颜色控制技术研究
Study on Color Control Technology for Stainless Steel by Chemical Coloring
 [PDF]

陈晓宇, 王宜民, 王海人, 屈钧娥, 曹志勇
Open Journal of Nature Science (OJNS) , 2013, DOI: 10.12677/OJNS.2013.13005
Abstract:
本文通CS350电化学工作站测试了不锈钢着色的电位时间曲线,分别比较了控制430不锈钢片着色的:时间一致、电位一致、电位差一致和达到终点电位后至电位稳定等四种情况下的彩色不锈钢颜色的重现性。结果表明:控制时间一致、电位一致、电位差一致,均难保证彩色不锈钢颜色的良好重现性,而当着色电位达到稳定的终点电位时,彩色不锈钢颜色的重现性很好。这种控制不锈钢着色达稳定的终点电位法,可望成为不锈钢连续卷带着色颜色控制的较好方法。
In this article, the potential vs time curves during the coloring process of the 430 stainless steel were tested by CS350 electrochemical workstation. The color reproduction of the colored stainless steel was controlled by same coloring time, same coloring potential, same potential difference and being colored to stable end potential. The results show that, when controlled by same coloring time, same coloring potential and same potential difference, it is difficult to guarantee good color reproducibility of the colored stainless steel. However the color reproducibility of colored stainless steel controlled by reaching the stable end potential is excellent. This stable end coloring potential method for controlling the coloring of stainless steel is a promising method which can be used in continuous coloring of stainless steel belt.
具无穷时滞中立型泛函微分方程的解的有界性及周期性
石磊
科学通报 , 1990,
Abstract: 本文考虑具无穷时滞中立型泛函微分方程:(d/dt)D_(x_t)=f(t,x_t) (1)和如下的中立型Volterra积分微分方程
具无穷时滞中立型泛函微分方程的解的有界性及周期性
石磊
科学通报 , 1990,
Abstract: 本文考虑具无穷时滞中立型泛函微分方程(d/dt)D_(x_t)=f(t,x_t)(1)和如下的中立型Volterra积分微分方程
变化环境下非一致性水问题研究进展
Advance in Inconsistent Water Problems in Changing Environment
 [PDF]

谢平, 李彬彬, 李析男, 陈广才
Journal of Water Resources Research (JWRR) , 2014, DOI: 10.12677/JWRR.2014.36068
Abstract:
近年来随着气候变化和剧烈人类活动等变化环境的影响,水文序列形成的物理条件发生了较大的变化,使得水文序列失去了“一致性”,并引发了水资源评价失真、防洪与抗旱决策失误等一系列“非一致性”水问题,严重影响了社会稳定与经济进步。本文将非一致性水问题分为非一致性水资源问题、非一致性洪水问题和非一致性干旱问题,分别从水资源、洪水、干旱三个角度对非一致性水问题进行研究和探讨。在总结国内外研究进展的基础上,指出目前仍需解决的问题及需要开展的研究工作。
A series of water problems was caused by the exploitation and utilization of water resources in recent years. The changing environment, the impact of climate change and intensive human activ-ities made the physical conditions for the forming hydrological series have changed a lot and the hydrological series have lost their consistency, thereby leading to the distortion of water resources evaluation and decision-making of flood control and drought judgment error, which seriously affected the social stability and economic progress. In this paper, inconsistent water problems were divided into three categories: inconsistent water resources problem, inconsistent flood problem and inconsistent drought problem, and the inconsistent water problem in changing environment was studied and discussed from the perspective of the water resources, flood and drought. Based on the domestic and abroad research progresses, the unresolved problems and the future research work were put forward.
改进云的短时mos预报的后处理技术
张立祥,David:A.UNGER
气象 , 1995, DOI: 10.7519/j.issn.1000-0526.1995.7.010
Abstract: 针对mos预报云高、云层质量不高的问题,探讨了对云的mos预报进行后处理的技术,并应用于云的mos预报中。结果表明,这些技术方法提高了云高的预报质量,消除了云高、云层和天空状况之间mos预报结果的不合理现象。
基于代价模型的不一致xml数据修复启发式计算
吴爱华?,王先胜?,谈子敬?,汪卫?
软件学报 , 2009,
Abstract: 在实际应用中,为不一致的xml文档计算最优修复意义重大.但求解最优修复是一个np完全问题,特别是在xml文档同时违反函数依赖约束和主键约束时.提出一个基于代价模型的、可以在多项式时间内完成的启发式修复求解算法.该算法首先借助索引表,在一遍扫描原始xml文档的情况下寻找不一致数据集,然后为每一类约束的不一致数据集构造候选修复,同时计算其修复代价,最后启发式地求解一个代价最小的修复方案.实验结果表明,该算法的时间复杂度不超过冲突类的3次方,即便是在不一致数据量很大、噪声比例很大以及涉及多类语义约束时,也能较快地完成修复.
Numerical simulation study of Models-3 in air quality of Shenyang
应用Models-3模式系统对沈阳市空气质量的数值模拟研究

WANG Yangfeng,ZUO Hongchao,MA Yanjun,LU Zhiyan,REN Wanhui,LIU Ningwei,ZHANG Yunhai,
王扬锋
,左洪超,马雁军,陆忠艳,任万辉,刘宁微,张云海

环境科学学报 , 2007,
Abstract: The transport and chemical conversion of atmospheric pollutants are simulated using new generation air quality models system Models-3 developed by Environmental Protection Agency in heating duration of Shenyang in 2002, and the results of simulated NO2, SO2 and PM10 concentrations and the observed ones are analyzed. The results display that the model can simulate the transport and chemical conversion of atmospheric pollutants better and variation features of the simulated and observed values are more identical. The results also shows that the model is able to simulate the spatial distribution and variation features of atmospheric pollutants better,which provides a useful tool for further developing numerical forecast and studying transport diffusion of atmospheric pollutants in Shenyang.
cc-numa并行系统通信优化的变换技术
陈渝?,李春江?,杨学军?,陈福接?
软件学报 , 2000,
Abstract: 减少通信开销是并行编译优化的主要目标之一.该文针对具有cache一致性的非一致存储访问并行系统(cc-numa)的特点,提出通过结合计算变换和数据变换,在统一的代数框架下对并行程序进行通信优化的策略和方法.通过实验测试,验证了此策略和方法是行之有效的.
FUZZY UNIFORM RING
模糊一致环

SHANG Hu,
尚琥

系统科学与数学 , 2005,
Abstract: In this paper, the fuzzy uniform ring, fuzzy uniform subring, fuzzy uniform residue class ring, and direct product of fuzzy uniform rings are defined; the three necessary and sufficient conditions to describe fuzzy uniform ring by the fuzzy topological ring of type (QU), by fuzzy uniform space and by a family of fuzzy subsets of a ring are obtained.
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