城市尺度生态足迹模型应用中不同参数选择的影响分析

针对生态足迹模型在城市尺度上应用中的均衡因子、产量因子和平均产量3个参数的不同取值方式,分别对不同参数应用模式下城市生态足迹核算的内涵和结果进行影响分析。基于对参数的应用条件和效果的解析,指出传统生态足迹模型的应用中存在误差模糊化处理和全球可比性差的问题,＂国家公顷＂生态足迹模型进行消费来源分解更贴切的体现区域特征。基于参数的尺度效应分析,指出生态足迹模型存在空间可比性和体现区域特征的悖论。通过对参数内涵和模型缺陷分析,探讨均衡因子和产量因子核算中的问题,空间可比性来源于平均产量的引入,并指出模型应用中的贸易调整过程存在缺陷,进而为生态足迹理论及方法论的进一步完善提供依据。     

关联理论与翻译等值

翻译是一个涉及大脑机制的推理过程,是一种言语交际行为;翻译是一种包括原文作者、译者和译文读者在内的三元关系。交际的成功与否取决于原作者的意图能否被译文读者所认识。翻译中的等值是相对而言的,它主要体现在语用等值、语义等值、形式对应等方面。     

岩质斜坡复杂块体稳定性评价研究

复杂块体具有多滑面、三维空间分布的特点。利用“等K法”进行刚体极限平衡分析的思路,将“等K法”延伸到三维空间。通过把复杂块体的多滑面、三维空间问题分解为若干子块的平衡;把复杂块体转换为若干楔体、及平面问题,使复杂问题简单化。根据这一思路,我们分析了某水电站库区高边坡复杂块体稳定性,工程实践证明,所建模型实用性较强。     

电工学分析中两个重要概念的剖析

平衡和等效两概念贯穿整个电工学体系。它们是分析和计算电工学中普通部题，特别是疑难问题的重要依据和手段。深入论证了平衡和等效概念的重要性，并介绍了应用 这两个概念的技巧。     

具滞后的中立型非线性定常离散控制系统的镇定性

应用频率等价法和比较原理，研究了具多组非整数滞后的中立型非线性定常离散控制系统的镇定问题     

关于完全正则半群同余对的一个公开问题

称S是(K)-酉的,如果S的每个正规子集是酉的.对关于同余对的公开问题"刻画关于任意K∈(K)(S),τ∈(JN)(S),(K,τ)∈(TP)(S)的完全正则半群"进行了探讨.得出:关于任意K∈(K)(S),τ∈(JN)(S),(K,τ)∈(TP)(S)当且仅当S是(K)-酉的密码群并半群.     

多元P范分布密度函数的统一

孙海燕、周世健等对P范分布及其参数估计理论作出了重大贡献,但他们提出了两种不同形式的P范分布密度函数.针对延续了10年的P范分布密度函数的形式差异和争议,讨论了两种不同形式的多元P范分布密度函数及其数据处理的特点,证明了两种不同形式的多元P范分布密度函数等价,从而统一了多元P范分布的理论基础,并提出有关的符号建议,以便于多元P范分布理论在数据处理中的推广应用.     

Home-field advantage accelerates leaf litter decomposition in forests

Several leaf litter decay studies have indicated that decomposition occurs more rapidly when litter is placed beneath the plant species from which it had been derived than beneath a different plant species (i.e. home-field advantage, HFA), although support for this notion has not been universal. We provide the first quantification of HFA in relation to leaf litter decomposition using published litter mass loss data from forest ecosystems in North America, South America, and Europe. Our findings indicate that HFA is widespread in forest ecosystems; on average litter mass loss was 8% faster at home than away. We hypothesize that HFA results from specialization of the soil biotic community in decomposing litter derived from the plant above it. Climate and initial litter quality data can be used to explain about 70% of the variability in litter decomposition at a global scale, leaving about 30% unexplained. We suggest that HFA be recognized as a factor that explains some of this remaining variability.     

Characterization and Liming Effect of Wood Ash Generated from a Biomass-Fueled Commercial Power Plant

Laboratory and greenhouse experiments were carried out to characterize and examine wood ash from a biomass-fueled commercial power plant as a lime. Experimental treatments include wood ash and two commercial limes applied at six application rates. The effective calcium carbonate equivalence (ECCE) of wood ash ranged from 22 to 49%. Wood ash increased soil pH by 0.31–3.18 over unlimed soils, and these changes in pH were similar to the effect of commercial limes. The soil pH at three weeks after wood ash application was constant through week seventeen. Wood ash increased electrical conductivity by 0.13–0.63 dS m^?1 compared to unlimed soils at three weeks after liming; however, a 39–69% decreased was observed by week seventeen. Common bermudagrass did not respond to the application of wood ash and commercial limes. The results of this study suggest that wood ash from the biomass-fueled commercial power plant with low ECCE could be a liming material.     

Bloch空间与带权的BMOA空间之关系

In this paper, we characterize the equivalence between the Bloch space (little Bloch space) and the weighted BMOA (M_a) (VMOA (m_a), a>-1) space.