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Search Results: 1 - 10 of 9123 matches for " 曲璐璐 "
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电感耦合等离子体原子发射光谱法测定高钢级管线钢中多种元素
Determination of Multi-Elements in High Grade Pipeline Steel by Inductively Coupled Plasma Atomic Emission Spectrometry
 [PDF]

刘养勤, 邵晓东,
Advances in Analytical Chemistry (AAC) , 2014, DOI: 10.12677/AAC.2014.44007
Abstract:
采用电感耦合等离子体原子发射光谱(ICP-AES)分析技术,同时测定了高钢级管线钢中的硅、锰、磷、铬、镍、钼、铌、钒、钛、铜、铝等元素。对试样溶解方法、元素分析谱线、仪器分析参数等因素进行了研究,选择了最佳的分析谱线及合适的仪器工作条件。方法应用于钢铁标准样品中各元素的测定,测定值与认定值吻合,精密度小于3%。方法应用于实际样品分析,测定了X90、X100管线钢中的元素含量,结果满意。
In this paper, by using inductively coupled plasma atomic emission spectrometry(ICP-AES) analysis, a method for simultaneous determination of Si, Mn, P, Cr, Ni, Mo, Nb, V, Ti, Cu and Al in high grade pipeline steel have been studied. The experiment factors including the method for dissolving sample, spectra of analyzed element and instrument parameters have been investigated. This method was applied to determine the elements in steel standard sample and the results were con-sistent with the certified values. The relative standard deviations (RSDs, n = 10) for all elements were smaller than 3%. The proposed method was successfully applied to X90 and X100 high grade pipeline steel practical samples determination with satisfactory results.
社会比较对合作任务结果评价的影响:来自erp的证据
窦炜,,
心理学报 , 2014,
Abstract: ?现实生活中人们通过社会比较获得对自身的认识。前人研究探讨了金钱收入的比较对个体结果评价的影响,而非金钱的社会比较效应的神经加工机制尚不清楚。本研究分离比较和金钱收入,使用双人合作的投骰子任务,先呈现“>”或“<”代表两人点数大小的比较结果,再呈现合作任务的输赢结果,考察非金钱的社会比较对合作任务结果加工的影响,记录任务表现的比较结果和最终合作任务结果的erp数据。发现在任务表现比较结果阶段,frn和p300对代表行为表现好坏的社会比较信息敏感,呈现无金钱输赢提示的点数大小的比较结果时,点数小于他人比大于他人诱发更大的frn和更小的p300;任务表现的比较结果对合作任务最终的金钱输赢结果的影响并没有反应在frn上。这些表明,对非金钱的社会比较信息的加工始于结果快速评价的早期阶段。
活性炭吸附硫化氢的性能研究
Performance Studies of Adsorption of H2S by Activate Carbon
 [PDF]


Hans Journal of Chemical Engineering and Technology (HJCET) , 2014, DOI: 10.12677/HJCET.2014.45009
Abstract:
天然气作为一种优质,高效,清洁的能源正越来越受到人们的重视。天然气中含有酸性气体H2S会威胁人身安全,造成环境污染等,因此在使用之前必须进行脱硫脱碳处理,使之达到国家标准。本实验研究制备了活性炭吸附剂,并在固定床吸附装置上考察了其脱除硫化氢的性能。
Natural gas has been paid more and more attention as a high quality, efficient and clean energy. Natural gas contains acid gas H2S, and it can lead to physical safety threats and environmental pollution, so desulfurization and decarbonization processing must be carried out before using to achieve the national standard. Activated carbon adsorbent was prepared in this article. This expe-riment studies the preparation of activated carbon adsorbent, and the effects of adsorbent that was removal of H2S were studied in the fixed adsorption bed.
从《天香》看王安忆创作的转型
Tianxiang and the Transformation of Wang-Anyi’s Works
 [PDF]


World Literature Studies (WLS) , 2013, DOI: 10.12677/WLS.2013.12003
Abstract:

从《长恨歌》到《富萍》、《上采红菱下种藕》,王安忆一直试图从日常生活的角度探索上海精神的本质。但是,世俗生活景象描绘到极致的时候,就会堙没于琐碎的细节之中,文章变得扁平。因此,《天香》是继《遍地枭雄》之后,王安忆探索上海精神之路上的又一次重要转型。王安忆通过设置与《红楼梦》中传统士大夫园林不同的天香园,试图在世俗生活中发现“雅趣”,以“雅”来提升日常生活的精神层面。以俗为底衬,以雅为雕饰,雅俗并济,乃是王安忆想要表现的上海精神的实质。
From A Song of Everlasting Sorrow to Fupin and Harvesting Water Caltrops and Lotus Rroots, Wang-Anyi has been trying to find the essence ofShanghaispirit in her works. However, her novels may be flooded by a large amount of details when too much attention is paid to the everyday life. Tianxiang, following Ambitious Heroes Around, represents an important transformation in her writings. Wang-Anyi createsTianxiangGardenin the novel, whose structure is different from the garden in A Dream of Red Mansions, searching the politeness taste in everyday life and elevating mental level. TheShanghaispirit which Wang- Anyi tries to find is a vulgar attitude combined with politeness.

石榴石异剥橄榄岩中橄榄石的钛铁矿和含铬钛磁铁矿出溶体
刘祥文,金振民,,
中国科学 地球科学 中国科学 地球科学 , 2005,
Abstract: ?在中国大陆科学钻探(CCSD)岩心中石榴石异剥橄榄岩橄榄石中发现杆状钛铁矿和含铬钛磁铁矿出溶体.利用透射电子显微镜及电子探针详细研究了杆状钛铁矿和含铬钛磁铁矿出溶体的成分、形态、结晶习性以及与寄主矿物橄榄石之间的拓扑关系.发现钛铁矿出溶体与Arami橄榄石中钛铁矿出溶体具有相似的特征,但含铬钛磁铁矿出溶体与Arami橄榄石中铬铁矿出溶体具有较大的差异.分析认为文中发现的杆状钛铁矿和含铬钛磁铁矿出溶体最初都是固溶在b相橄榄石中,以后随着压力降低,发生固溶体分解而产生含铬钛磁铁矿及钛铁矿出溶体;该石榴石异剥橄榄岩可能曾经就位于300km以下的地幔转换带.
锡-向红菲啰啉络合物的1.5次微分吸附伏安法研究
李秀玲,卢燕,连家,
分析化学 , 1995,
Abstract: 本文研究了锡-向红菲啰啉体系在悬汞电极上的伏安行为,在pH=2.80的0.07mol/L氯乙酸-氯乙酸钠介质中,Sn(Ⅳ)-向红菲啰啉络合物于1.5次微分伏安图上在-0.56V(vs.SCE)电位处产生一良好的吸附还原波,波高与Sn(Ⅳ)的浓度在5.0×10-9~6.O×10-7mol/L范围内呈线性关系,检出下限为2.5×10-9mol/LSn(Ⅳ),用本法对冶金标样中锡进行测定,取得了满意的结果.
脉冲激光作用单晶硅的等离子体光谱分析
刘丽炜,,谭勇,张喜和
强激光与粒子束 , 2010,
Abstract: ?从激光与物质相互作用理论出发,对脉冲激光作用单晶硅的热特性进行分析。建立一套实验装置,所用激光光源的波长为1064nm,脉宽为10ns,重复频率为1hz。得到单晶硅的等离子体谱及热辐射谱,在单晶硅的光电性质基础上对其热表面损伤进行理论分析。提取380~460nm波段的单晶硅等离子体光谱,分析了谱图中siⅰ390.52nm,siⅱ385.51nm,siⅱ413.12nm三条谱线的相对强度与激光输出功率密度的对应关系。
滋阴益气活血方治疗糖尿病肾病的临床研究
田雪飞,易法银,
中国中医药信息杂志 , 2001,
Abstract: 目的:探讨滋阴益气活血方对糖尿病肾病的治疗作用。方法:观察治疗32例住院和门诊患者,并与口服达美康加依那普利对照组相比较。结果:观察组在多饮、五心烦热、腰膝酸软、尿黄便干等症状体征方面改善明显(p<0.05),其降血糖的效果与对照组比较无显著性差异(p>0.05)。患者尿微量白蛋白及24h尿蛋白定量均有显著减少(p<0.01),血肌酐也明显改善(p<0.05),明显降低血脂(p<0.05),观察组降tg效果优于对照组(p<0.05)。两组对血液流变学指标均有所改善(p<0.05)。结论:提示滋阴益气活血方
城市土地集约利用评价及其驱动因子分析——以绥化市为例
长祥,,冯翔迪
- , 2015,
Abstract: 在综合考虑经济因素、社会因素、生态因素对绥化市土地集约利用评价影响的基础上,建立中观层次的土地集约利用评价体系,运用最优组合赋权法和多目标综合评价法对绥化市2004~2012年的城市土地集约利用水平综合评价。以2004~2012年绥化市土地集约利用评价指标体系的各指标序列作为基础数据,利用统计软件SPSS19.0对相关数据进行计算,对影响绥化市土地集约利用水平的驱动因素进行分析。结果表明,2004~2007年绥化市土地集约利用系统呈现不集约状态。2008~2009年绥化市土地集约利用系统处于比较集约状态。2010~2011年土地集约利用系统处于集约状态。2012年土地集约利用系统处于十分集约状态。
分布式驱动电动汽车纵向车速非线性自适应估计
余卓平,夏新,,
- , 2016, DOI: 10.11908/j.issn.0253-374x.2016.05.019
Abstract: 基于分布式驱动电动汽车,提出了一种纵向车速非线性自适应估计算法.该算法使用车辆加速度传感器信息和各车轮滑移率反馈值对车辆纵向车速进行估计.从理论上证明了纵向速度估计误差收敛.根据各车轮滑移率的大小确定各轮速估计误差在估计算法中的反馈修正比例.使用带遗忘因子的递推最小二乘算法在坡道路面对路面坡度进行了在线实时估计,进而使用坡度估计值修正纵向加速度传感器信息,实现了坡度自适应纵向车速估计.该方法具有计算量小、估计精度高的优点.通过多工况的实车试验验证了算法的有效性.
A new algorithm for vehicle longitudinal velocity using the nonlinear adaptive estimation method was proposed based on distributed drive electric vehicle. According to the information of longitudinal acceleration sensor and the feedback value of each wheel slip ratio, the vehicle longitudinal velocity was estimated and algorithm proved the longitudinal velocity estimation error convergence. Depending on each wheel slip ratio, the feedback correction proportion for estimation algorithm of each wheel speed estimation error was determined. The road slope was estimated online using recursive least square with forgetting factor in rampway. In addition, the longitudinal acceleration sensor information was calibrated by the slope estimation value for slope adaptive longitudinal velocity estimation. The amount of computations for this method was small but with high estimation precision. Furthermore, the effectiveness of the algorithm was validated through experiments under multiple working conditions
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