基于气相色谱-离子迁移色谱分析不同贮藏方式对洋葱浆馕风味的影响

采用气相色谱-离子迁移谱（gas chromatography-ion mobility spectrometry，GC-IMS）对洋葱浆馕6 种不同贮藏条件下挥发性物质进行分析，包括低温贮藏、室温贮藏、真空贮藏、脱氧贮藏、保鲜剂贮藏和保鲜剂结合脱氧贮藏。研究表明：在洋葱浆馕中共鉴定出66 种挥发性风味物质，其中包括醇类9 种、酮类4 种、醛类18 种、酯类4 种、呋喃衍生物3 种，酸类1 种和未能识别的化合物27 种。随着贮藏时间的延长，低温贮藏和真空贮藏洋葱浆馕在贮藏期内醛类挥发性有机物基本不变，其他处理组的醛类挥发性有机物在贮藏期内变化呈降低的趋势。结合主成分分析和欧氏距离可以发现低温贮藏和其他贮藏方式的第0天挥发性物质种类和浓度较为接近，主成分分析图中点的位置也相聚在一起，说明低温贮藏馕的挥发性物质变化不明显。该研究建立不同贮藏方式洋葱浆馕挥发性气味指纹图谱，可视化出洋葱浆馕挥发性成分轮廓，为洋葱浆馕贮藏期间风味变化规律提供信息。     

空间的力量 新奥胡斯大学医院

正新奥胡斯大学医院是丹麦第一个超大型的医院案例,也是一个具有"康复医疗"概念的、超现代的国际先锋作品。医院的建筑设计通过系统运用"信息和循证"的工作方法,践行了"康复建筑"的综合理念。其"信息和循证"的方法是利用对现存建筑的研究和评估,以提供最有效的信息来创建最佳的康复建筑。从单人病房的设计、日光和光线的利用,以及景观和花园空间的设计,旨在尽量满足病人的需求,提升     

特雷胡斯的修复与复苏,瓦伦达斯,瑞士

正两位建筑师相信建筑的力量,相信一座好的建筑影响社会的可能性。在2007年,瓦伦达斯-因波斯基金会让建筑师们做一个研究,关于重建村落中央广场、村落核心周围的建筑能否重新激活瓦伦达斯村中心的可能性。其结果是,几位建筑师处理了有着特定功能的特定建筑:吉翁·卡米纳达将1517年的"Engihuus"改造成为一个餐厅与酒店综合体,尼克逊·瓦尔德将一座老学校改造成为一座博物馆,而布卢门塔尔和卡保罗将特雷胡斯改造成为一个供两个家庭使用     

泥炭泥浆在治疗中的放射性

正为确定泥炭泥浆中天然和人工同位素的含量,并估算标准泥炭泥浆处理过程中患者皮肤吸收的辐射剂量,分析了从波兰8个矿泉采集的37个样本,用γ能谱法测量同位素浓度活性。标准泥炭泥浆浴治疗中的皮肤剂量约为300 nSv,泥炭泥浆这种治疗的有效剂量被认为是22 nSv。治疗过程中     

井下修井技术现状及优化分析探讨

在油田开发过程中,井下不可避免的出现各种问题,这就使得井下修井技术在保持油田产量方面发挥重要作用。但在井下修井技术中还是存在一定的问题,本文主要是从分析当前设备现状和事故现状入手,探讨井下修井技术的优化方法和措施,以此来提升修井效果。     

地层测试技术在低渗透性地层中的应用

随着我国经济发展和科技进步,我国地层研究行业得到了很大发展,尤其是在地层测试技术方面,取得了重要进步,对我国低渗透性地层的研究有着重要作用。在地层测试工作中,我们还要注意引入一些特殊的施工技术,如测射联作施工工艺,进而在更大程度上保证我国地层测试事业的发展。为进一步加强人们对土层相关参数的了解和掌握,本文就对地层测试技术在低渗透性地层中的应用进行研究,并结合一些应用实例进行深入分析,提出一些相关建议,以供大家参考。     

动力锂离子电池涂布烘干炉用能及成本分析

介绍了动力锂离子电池涂布工艺及涂布烘干炉的发展现状,结合主流涂布烘干技术,分析其用能因素,对不同热源方式进行效率及成本比较,并对涂布设备发展和动力锂离子电池生产提出建议。     

Toward Energy-Efficient and Trustworthy eHealth Monitoring System

The rapid technological convergence between Internet of Things(IoT),Wireless Body Area Networks(WBANs)and cloud computing has made e-healthcare emerge as a promising application domain,which has significant potential to improve the quality of medical care.In particular,patient-centric health monitoring plays a vital role in e-healthcare service,involving a set of important operations ranging from medical data collection and aggregation,data transmission and segregation,to data analytics.This survey paper firstly presents an architectural framework to describe the entire monitoring life cycle and highlight the essential service components.More detailed discussions are then devoted to {\em data collection} at patient side,which we argue that it serves as fundamental basis in achieving robust,efficient,and secure health monitoring.Subsequently,a profound discussion of the security threats targeting eHealth monitoring systems is presented,and the major limitations of the existing solutions are analyzed and extensively discussed.Finally,a set of design challenges is identified in order to achieve high quality and secure patient-centric monitoring schemes,along with some potential solutions.     

Strain rate dependency and fragmentation pattern of expanding warheads

For the characterization of the behaviors of a metal material in events like expanding warheads, it is necessary to know its strength and ductility at high strain rates, around 104e105/s. The flyer plate impact testing produces the uniform stress and strain rates but the testing is expensive. The Taylor test is relatively inexpensive but produces non-uniform stress and strain fields, and the results are not so easily inferred for material modeling. In the split-Hopkinson bar(SHB), which may be used in compression, tension and torsion testing, the strain rates never exceeds 103/s. In the present work, we use the expanding ring test where the strain rate is 104e105/s. A streak camera is used to examine the expanding ring velocity, and a water tank is used to collect the fragments. The experimental results are compared with the numerical simulations using the hydrocodes AUTODYN, IMPETUS Afea and a regularized smooth particle(RSPH) software. The number of fragments increases with the increase in the expansion velocity of the rings. The number of fragments is similar to the experimental results. The RSPH software shows much the same results as the AUTODYN where the Lagrangian solver is used for the ring. The IMPETUS Afea solver shows a somewhat different fragmentation characteristic due to the node splitting algorithm that induces pronounced tensile splitting.