拟除虫菊酯类农药在NCI源和EI源中的质谱行为

通过分析19种拟除虫菊酯类农药（pyrethroid pesticides, PyPs）在负化学离子源（NCI）和电子轰击离子源（EI）中的碎片离子信息,得出每种农药在不同离子源中的质谱行为差异。在NCI源中,PyPs获得1个热电子,形成负离子后不稳定而发生热裂解,与酯基相连的碳氧键断裂形成菊酯烷酸根离子,再脱去中性分子（如CO₂、HF、HCl、HCF3等）形成各种碎片离子。一般情况下,含卤原子越多的PyPs,其在NCI源的响应越高。在EI源中,PyPs裂解规律为：1） 与羰基相连的碳氧键发生α-断裂脱去1分子CO,得到含环丙烷结构的特征碎片离子;2） 发生六元环的氢原子重排,当含有苄基苯基醚且甲基上有氰基取代基的PyPs,易形成m/z 181、208特征碎片离子,而不含氰基的PyPs易形成m/z 183特征碎片离子。     

叠前弹性参数反演在黄珏油田的应用

为了预测苏北盆地高邮凹陷黄珏油田岩性油气藏Ed2^4有利砂体发育区，提出了利用叠前弹性参数反演预测砂体的思路。通过研究区地层弹性参数对砂岩的敏感性分析试验，筛选出2个对砂岩反应较敏感的弹性参数（弹性波阻抗和体积模量）。在精细地震AV0处理的基础上进行AV0属性反演，然后将常规波阻抗反演算法应用于AV0属性数据，最终得到纵波速度、30°弹性波阻抗和体积模量3个弹性参数。针对黄珏油田Ed2^4地层特征，利用30°弹性波阻抗、体积模量和弹性波阻抗的反射率预测有利砂体发育区。Ed2^4体在平面上整体呈扇形展布，主要可分为2个大的朵叶体，其中位于H83井-H32井西侧的②号砂体发育区最为有利，是下一步岩性油气藏勘探的有利目标。图6参14     

Life Cycle Assessment of the inclusion of phase change materials (PCM) in experimental buildings

The present work evaluates the environmental impact of including phase change materials (PCM) in a typical Mediterranean building. A Life Cycle Assessment (LCA) is developed for three monitored cubicles built in Puigverd de Lleida (Spain). It is possible to control the inner temperature of the cubicles using a domestic heat pump for cooling and an electrical radiator for heating: The energy consumption is registered to determine the energy savings achieved. The aim is to analyze if these energy savings are large enough to balance the environmental impact originated during the manufacturing of PCM.Some hypothetical scenarios, such as different systems to control the temperature different PCM types or different weather conditions are proposed and studied using LCA process to point out the critical issues. Furthermore, a parametric analysis of the lifetime of buildings is developed.Results show that the addition of PCM in the building envelope, although decreasing the energy consumption during operation, does not reduce significantly the global impact throughout the lifetime of the building. For the hypothetical scenario considering summer conditions all year around and a lifetime of the building of 100 years, the use of PCM reduces the overall impact by more than 10%.     

Analysis of selected phthalates in Canadian indoor dust collected using household vacuum and standardized sampling techniques

Phthalates have been used extensively as plasticizers to improve the flexibility of polymers, and they also have found many industrial applications. They are ubiquitous in the environment and have been detected in a variety of environmental and biological matrices. The goal of this study was to develop a method for the determination of 17 phthalate esters in house dust. This method involved sonication extraction, sample cleanup using solid phase extraction, and isotope dilution GC/MS/MS analysis. Method detection limits (MDLs) and recoveries ranged from 0.04 to 2.93 μg/g and from 84 to 117%, respectively. The method was applied to the analysis of phthalates in 38 paired household vacuum samples (HD) and fresh dust (FD) samples. HD and FD samples compared well for the majority of phthalates detected in house dust. Data obtained from 126 household dust samples confirmed the historical widespread use of bis(2‐ethylhexyl) phthalate (DEHP), with a concentration range of 36 μg/g to 3840 μg/g. Dibutyl phthalate (DBP), benzyl butyl phthalate (BzBP), diisononyl phthalate (DINP), and diisodecyl phthalate (DIDP) were also found in most samples at relatively high concentrations. Another important phthalate, diisobutyl phthalate (DIBP), was detected at a frequency of 98.4% with concentrations ranging from below its MDL of 0.51 μg/g to 69 μg/g.     

山东建筑大学学术论文被三大检索收录引用情况分析

国际三大检索是衡量一个机构的学术水平和科研能力的重要因素,在一定程度上能反映自然科学基础研究的学术水平.文章对2005~2009年SCI、EI、ISTP收录和引用山东建筑大学学术论文情况进行了统计分析,旨在揭示山东建筑大学在三大检索系统收录期刊上发表论文的现状、学术水平、科技能力和学术交流能力,最后提出了提高学术论文被三大检索系统收录和引用的建议.     

河流健康评价指标体系构建及其应用——以浑太河流域为例

依据土地利用指数(land use index)、栖息地质量指数(QHEI)和水质参数构建一个综合指数(ILWHQ),用于浑太河流域参照点的定量筛选。结果表明,太子河流域支流小汤河上游、太子河南支的5个采样点为参照点(ILWHQ≤2;T13,T15,T16,T17,T18)。根据2012年浑太河流域68个采样点的鱼类数据,对35个候选参数进行主成分分析、判别能力、逐步回归分析和Pearson相关性分析,确定了鲤科鱼类种类数(F5)、底栖鱼类个体比例(F12)、杂食性鱼类比例(F14)、耐受性鱼类个体比例(F22)可以作为基本要素构建F-IBI指标体系,即采用比值法统一各生物参数量纲,将各个生物参数分值加和得到F-IBI指数值。利用构建的F-IBI指数开展浑太河流域河流健康状况评价。发现太子河流域41个点位中,5个为健康,11个为亚健康,8个为一般,9个为较差,8个为极差。浑河的23个点位中,5个为亚健康,6个点位为一般,6个为较差,6个为极差。太子河流域较差和极差的点位共占41.5%,浑河流域较差和极差点位共占52.2%,说明相比于太子河流域,浑河流域的健康状况较差。     

An LCA based indicator for evaluation of alternative energy routes

Politicians and policymakers are searching for alternatives for current energy conversion systems in order to reduce environmental pollution whilst preserving scarce natural resources. When defining new alternatives it is important to find out how environmentally friendly and sustainable these alternatives are, and which of them will ensure a major improvement in environmental issue. To answer such questions the present work proposes a new type of indicator based on exergy life cycle data. Alternative energy routes towards different services and commodities are compared in terms of environmental impact and indirect natural resource costs. Two case studies are presented using data from the Ecoinvent database (v2.01 2007) to compare alternatives to petrol transport and fuel oil power generation. The alternative transport routes assessed were methanol and biogas fueled cars, and wind electricity in the case of power generation.     

国际三大检索系统最新动态及投稿技巧

简单介绍了国际公认的三大检索系统SCI、EI和ISTP的收录特点、发展变化和所收录期刊源的最新动态,指出论文被三大国际检索系统收录具有重要意义,分析了影响论文收录的主要因素,并提出了相应的建议。     

IGD515在地铁变流器驱动电路中的优化设计与应用

在地铁变流器的研制中,为解决高压大功率IGBT使用的驱动问题,本文选用了瑞士CONCEPT公司研制的驱动模块IGD515EI。经试验表明以IGD515EI为核心的驱动电路达到了设计要求,并在地铁变流器中取得了良好的实用效果。     

Estimating the self-healing capability of cementitious composites through non-destructive electrical-based monitoring

Self-healing evaluation of cementitious composites was made by non-destructive test (NDT) methods (electrical impedance [EI], rapid chloride permeability test [RCPT] and resonant frequency [RF]). Correlations among results obtained from different NDT methods were reported. Conclusions revealed that EI testing is easy to perform, takes very limited time and looks promising for self-healing assessment although the method itself seems to be remarkably influenced by anything modifying the ionic state of specimens. A solid exponential relationship exists between EI and RCPT measurements, but results from RF tests do not correlate with EI and RCPT results due to different parameters affecting individual tests.