低辐射薄膜的研究进展

低辐射薄膜(Low-E Film)发展了20多年,它的高可见光透射率和高红外紫外光的反射率被应用在很多领域.低辐射薄膜一般由在线法和离线法制备,所得结构不同,性能也有较多差异.时低辐射薄膜的制备方法、性能,以及最新研究进展和应用进行了综述,并对2种类型的低辐射薄膜进行了比较.     

国内外城镇化与生态环境协调关系动态研究

为探讨当今城镇化与生态环境的研究重点和方向,进一步丰富城镇化与生态环境协调发展的研究理论,促进城镇化、生态环境健康发展。本文通过系统梳理国内外城镇化与生态环境协调关系的理论与实证研究文献,分析目前研究现状与存在的主要问题。指出在城镇化和生态环境指标的构建上有待进一步完善、研究维度上有待进一步深化、研究尺度上有待进一步拓展,进一步明晰了城镇化与生态环境高质量发展路径,为未来该领域理论完善提供借鉴。     

Fe2O3气敏材料研究进展

综述了近年来Fe_2O_3气敏材料常用的合成方法,如sol-gel法,沉淀法,水热法和微乳液法。总结了焙烧温度与掺杂效应对气敏性能的影响,探讨了气敏机理模型,并对今后的研究方向提出了一些看法。     

信息融合技术在情绪识别领域的研究展望

简要介绍目前几种基于不同数据源的情绪识别方法和信息融合技术基础, 为工程技术人员提供一定的理论背景。对多源信息融合领域的情绪识别现状进行了分类介绍, 说明和分析了基于多源信息融合的情感识别存在的问题, 简述了其在情绪识别领域的应用前景。     

Neurochemical Alterations in Social Anxiety Disorder (SAD): A Systematic Review of Proton Magnetic Resonance Spectroscopic Studies

(1) Objective: Considering that current knowledge of mechanisms involved in the molecular pathogenesis of Social Anxiety Disorder (SAD) is limited, we conducted a systematic review to evaluate cumulative data obtained by Proton Magnetic Resonance Spectroscopic (¹H MRS) studies. (2) Methods: A computer-based literature search of Medline, EMBASE, PsycInfo, and ProQuest was performed. Only cross-sectional studies using ¹H MRS techniques in participants with SAD and healthy controls (HCs) were selected. (3) Results: The search generated eight studies. The results indicated regional abnormalities in the ‘fear neurocircuitry’ in patients with SAD. The implicated regions included the anterior cingulate cortex (ACC), dorsomedial prefrontal cortex (dmPFC), dorsolateral prefrontal cortex (dlPFC), insula, occipital cortex (OC), as well as the subcortical regions, including the thalamus, caudate, and the putamen. (4) Conclusions: The evidence derived from eight studies suggests that possible pathophysiological mechanisms of SAD include impairments in the integrity and function of neurons and glial cells, including disturbances in energy metabolism, maintenance of phospholipid membranes, dysregulations of second messenger systems, and excitatory/inhibitory neurocircuitry. Conducting more cross-sectional studies with larger sample sizes is warranted given the limited evidence in this area of research.     

Mixed Messages about Mixed Tenure: Do Reviews Tell the Real Story?

Mixed tenure is the predominant development and regeneration strategy and is a key component of UK housing and urban policy. It is purported to provide wide-ranging social, environmental and economic benefits to residents. While there is a large literature on mixed tenure, policy makers are likely to rely on reviews and summaries of the evidence rather than primary studies. But can they rely on such reviews? Using systematic review methods this paper critically appraises recent reviews for the evidence that mixed tenure policies and strategies have achieved any of these expected benefits. Of the six UK reviews of primary studies, most drew on less than half the available primary studies, none provided a critical appraisal of individual studies and made no comment on conflicting evidence between and within studies. While the reviews gave indications of the deficiencies of the evidence base, rather than focus on the implications of these deficiencies, four of the six reviews emphasised the positive effects of tenure mix.     

共振瑞利散射光谱法在药物分析中的应用概述

共振瑞利散射光谱法因具有简便操作、灵敏度高的优势,已在药物研究领域得到广泛应用。本文综述了近年来共振瑞利散射光谱法在药物分析测定方面取得的成果,着重介绍在抗生素类,麻醉类、多糖类和一些新药等方面的应用。     

磺胺地索辛合成进展

磺胺地索辛是典型的长效磺胺类抗菌药,T1/2为40h,有很强的抗细菌及原虫感染的作用,可用于上呼吸道及尿路感染,目前广泛用于畜禽疾病的治疗和预防;此外,它对畜禽生长有促进作用,又作为饲料添加剂被广泛应用。文章介绍了磺胺类抗菌药磺胺地索辛的合成进展,并评价了各工艺的优缺点。     

MEMS超级电容器研究进展

基于微机电系统(Micro-electro-mechanical systems,MEMS)技术的微型超级电容器是一种以微纳米结构形式实现储能的微型能量存储器件,具有高比容量、高储能密度和高抗过载能力等特点,在MEMS微电源系统、引信系统以及物联网等技术领域具有广泛的应用前景。分析了超级电容器的基本原理和种类,系统综述了MEMS超级电容器的国内外研究现状,重点讨论了基于MEMS加工技术的超级电容器制造方法和优势,从材料、结构设计、加工工艺方面分析了MEMS超级电容器存在的技术瓶颈问题,并展望了其未来的发展趋势和应用需求。     

ASAAC标准体系架构述评

联合标准化航电系统架构协会(ASAAC)定义了先进航空电子体系结构(A3)的开放式标准、概念和指导原则,该标准和指导原则主要用于2005年以后新的飞机项目和现有飞机的升级计划。ASAAC标准定义了综合模块化航空电子系统(IMA),该标准是为了建立一个统一的IMA体系结构。IMA由通用的组件构成,这些组件可以在单独的标准中定义和说明。针对ASAAC标准定义的航电系统顶层体系架构,概述了该架构的一些设计指导原则,同时简要介绍了IMA架构。