光热-光电集成型太阳能孵化机设计

传统孵化机局限性很大,一旦停电,胚胎将会死亡,严重影响孵化效率。为了克服上述缺点,提出一种以太阳能光热为主、光电为辅的孵化机设计方案。采用集热管加热太阳能热水器中的水,并送至孵化箱内部的铜制“暖气片”;通过控制器控制电磁阀、通风风扇、加湿管等保持孵化箱内适宜的孵化环境;“暖气片”中的水温下降后再由水管排至冷水箱中,并用泵把冷水箱中的水打入热水器,形成对水的循环利用;将太阳能电池板发出的电储存在蓄电池里面,用来为控制器及灯泡等供电,或在阴雨天气为孵化机的加热片加温。该孵化机符合国家新能源发展政策,节能环保。     

“Rather a manager and networker than a researcher”: converging technologies in the clinic

Technological developments brought about new approaches to and new insight into the functioning of the brain and neurological disorders. More specifically, advancement in the areas of neuroimaging, genomic technologies and molecular biology is conceived as a pathway to more differentiated diagnosis and appropriate treatment. In this regard, the convergence of technologies in the area of health care and medical research has significantly increased during the past two decades. The aim of this article is to better understand how the convergence of technologies in the field of neuroscience takes place at the micro-level of knowledge production, namely the clinic. It is based on the results of an ethnographic study conducted at an Epilepsy Monitoring Unit in Vienna. I start from the assumption that the convergence of technologies in the diagnosis and treatment of epilepsy anticipates a specific means of knowledge production that impacts on the understanding and definition of neurological conditions and the identity of patients and medical doctors simultaneously. One important result concerns the scientization of the way that people with epilepsy perceive, explain and understand epilepsy and the brain. On the one hand respective narratives seem to support the scientific definition of epilepsy; on the other, the failure of seizure control tends to induce a specific understanding of the brain as having unpredictable and uncontrollable mastery over body, memory and soul.     

‘The Older I Get,the Colder I Get’—Older People’s Perspectives on Coping in Cold Homes

Abstract

An average of 26,560 UK excess winter deaths occur in people 65+ years old each winter, of which 30% are attributed to cold homes. Cold homes are known to exacerbate health problems prevalent in the 65+ demographic. Through conducting interviews in homes occupied by 65+-year-olds known to be achieving less than the World Health Organization (WHO) minimum recommended temperature (18ºC), this article highlights their struggles in maintaining health and managing their homes, with instances of extreme and potentially dangerous methods to achieve thermal comfort identified. Fairer energy provision, better targeted financial aid, and improved support networks are necessary to alleviate current problems.     

腺苷负荷试验心肌核素显像对冠心病的诊断价值

目的分析腺苷负荷试验心肌核素显像诊断冠心病的敏感性、特异性及其特点。方法住院患者行冠状动脉造影和腺苷负荷试验心肌核素显像检查。腺苷总量为140μg／（kg·min）,6min匀速静脉泵入,腺苷泵入3min时静脉推注99m锝-甲氧基异丁基异腈核素显像925MBq,1h后进行心肌断层显像,若异常,次日行静息心肌显像。结果腺苷负荷试验心肌核素显像对于冠心病诊断的敏感性和特异性为87．0％和64．2％。前降支病变48例,心肌核素前壁低灌注41例,回旋支病变33例,侧壁低灌注27例,右冠脉病变38例,下壁低灌注37例,右冠脉病变较前降支或回旋支病变的心肌核素显像阳性率高（P〈0．05）。结论腺苷负荷试验心肌核素显像对于冠心病诊断的敏感性、特异性较高。     

配合物K2[Cu（C2O4）2]·2H2O与K3[Cr（C2O4）3]·3H2O的热分解反应及其动力学研究

采用TG—DSC方法研究了K2[Cu（C2O4）2]·2H2O与K3[Cr（C2O4）3]·3H2O两个配合物的热分解反应过程,对其中部分热解过程进行了动力学计算。由Friedman、Ozawa—Flynn—Wall、AST—ME698三种方法得出峰温时的活化能值与指前因子值。应用Achar方法计算拟合得到了比较合理的机理函数。     

A Model of Minimal Probabilistic Belief Revision

In the literature there are at least two models for probabilistic belief revision: Bayesian updating and imaging [Lewis, D. K. (1973), Counterfactuals, Blackwell, Oxford; Gärdenfors, P. (1988), Knowledge in flux: modeling the dynamics of epistemic states, MIT Press, Cambridge, MA]. In this paper we focus on imaging rules that can be described by the following procedure: (1) Identify every state with some real valued vector of characteristics, and accordingly identify every probabilistic belief with an expected vector of characteristics; (2) For every initial belief and every piece of information, choose the revised belief which is compatible with this information and for which the expected vector of characteristics has minimal Euclidean distance to the expected vector of characteristics of the initial belief. This class of rules thus satisfies an intuitive notion of minimal belief revision. The main result in this paper is to provide an axiomatic characterization of this class of imaging rules.     

邻苯二甲腈聚合物高性能化及功能化技术途径

该文主要就性能优异的邻苯二甲腈聚合物的高强度、高模量、高热稳定性及其特种功能化技术进行探讨,重点开展聚合物合成结构的化学反应功能化设计,获得了较好加工、方便交联固化反应的热固性树脂体系,为先进复合材料的RTM或RIM加工技术的应用提供了高性能基体树脂。通过分子结构的设计将二茂铁结构引入双邻苯二甲腈树脂结构中,获得具有居里温度大于300℃的有机磁性材料。利用邻苯二甲腈与金属或金属盐的反应特点,获得了无机-有机杂化磁性功能复合材料。通过碳纳米管表面-CN化获得了反应功能一体化的CNT/邻苯二甲腈纳米功能复合材料,通过化学控制合成技术制备了高介电常数的超支化酞菁铜,得到了高强度的聚芳醚腈介电薄膜。探讨了电场、磁场以及剪切应力场等加工方式对聚合物微结构的影响。这些功能化技术途径的探索对邻苯二甲腈聚合物的研究开发与应用具有重要的科学意义和现实意义。     

粗糙集方法在医学影像诊断分析中的应用

医学诊断常面对越来越多的医学影像数据信息,比较不同分析方法对于疾病诊断十分必要.对183例脑胶质瘤的MR资料分别使用粗糙集理论和logistic回归分析方法导出影像诊断规则.与病理结果对比后发现,使用粗糙集理论的诊断规则准确性高于其他统计方法.粗糙集理论对提高医学影像学诊断水平有更好的临床应用价值.     

新型热电--印染联合循环系统研究

提出了一种新型热电-印染联合循环系统,该系统将热电厂的烟气与印染厂的印染污水有机整合,用煤燃烧的酸性烟气作为印染污水治理的中和原料,实现电厂与印染厂的综合互补利用,使热能得到合利利用,治污成本降低,经济性提高,为电厂和印染厂循环经济提供了新方法．     

微波合成纺锤形CeOHCO_3及热转化为CeO_2

采用简便快速的微波法合成出具有纺锤形状的CeOHCO3,并以其为前驱体,通过热处理获得纺锤形状的CeO2产品.分别采用X射线衍射仪（XRD）、透射电子显微镜（TEM）、扫描电子显微镜（SEM）、能量色散X射线光谱仪（EDX）、傅立叶变换红外光谱仪（FT-IR）及紫外-可见光谱（UV-Vis）等技术对产品进行了表征.结果表明,制得的CeOHCO3产品为正交晶相,热处理得到的CeO2产品为立方晶相,产品尺寸为微米级且较为均匀,纯度较高,结晶度较好.光学性质表明,CeO2产品在紫外区有较强的吸收.