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气相色谱/ECD法检测苯丙胺类毒品
Studies on Detection of Amphetamines by Gas Chromatography/ECD
 [PDF]

翟志强, 石腾,
Hans Journal of Chemical Engineering and Technology (HJCET) , 2014, DOI: 10.12677/HJCET.2014.46011
Abstract:
本文探究了气相色谱法的电子俘获检测器测定苯丙胺类毒品的方法。在一定色谱条件下利用苯丙胺、甲基苯丙胺、伪麻黄碱标准溶液绘制苯丙胺类毒品的标准曲线,得到苯丙胺的标准曲线为y = 5.36x ? 690.98,R = 0.9994,线性范围为2.0 × 102 μg?mL?1~1.0 × 103 μg?mL?1,检出限为2.0 × 102 μg?mL?1,相对标准偏差为9.83%,甲基苯丙胺的标准曲线为y = 1.34x + 215.8,R = 0.9980,线性范围为2.0 × 102 μg?mL?1~2.0 × 103 μg?mL?1,检出限为2.0 × 102 μg?mL?1,相对标准偏差为6.29%,伪麻黄碱的标准曲线为y = 8.07x + 176.38,R = 0.9988,线性范围为6.4 × 10?1 μg?mL?1~4.0 × 102 μg?mL?1,检出限为6.4 × 10?1 μg?mL?1,相对标准偏差为5.69%;并检测缴获的苯丙胺类毒品的有效成分及其含量。采用分散液相微萃取技术提取上述三种毒品,其平均回收率为39.70%、51.68%、65.05%。本文为法庭科学提供了检测苯丙胺类毒品的新方法。
This paper studies the way to detect amphetamines with the use of gas chromatography, or to be specific, the electron capture detector method. By detecting amphetamine, methamphetamine and pseudoephedrine under a certain condition, the standard curves were drawn. The standard curve of amphetamine is y = 5.36x ? 690.98, R = 0.9994. Its linearity range is 2.0 × 102 μg?mL?1~1.0 × 103 μg?mL?1. Its detection limit is 2.0 × 102 μg?mL?1 and its RSD is 9.83%. The standard curve of me-thamphetamine is y = 1.34x + 215.83, R = 0.9980. Its linearity range is 2.0 × 102 μg?mL?1~2.0×103 μg?mL?1. Its detection limit is 2.0×102μg?mL?1 and its RSD is 6.29%. The standard curve of pseu-doephedrine is y = 8.07x + 176.38, R = 0.9988. Its linearity range is 6.4 × 10?1 μg?mL?1~4.0 × 102 μg?mL?1. Its detection limit is 6.4 × 10?1 μg?mL?1 and its RSD is 5.69%. Some drugs seized by local police were analyzed and their active ingredients and contents were defined. Amphetamines were extracted with dispersive liquid-liquid microextraction (DLLME) and the results showed that the average recovery of amphetamine is 39.70%, methamphetamine’s is 51.68% and pseudoephe-drine’s is 65.05%. This article can provide as reference for judicial detecting of amphetamines.
Determination of Tetramine in Urine and Blood by Solid Phase Membrane Extraction-Gas Chromatography
固相膜萃取-气相色谱法测定尿液和血液中的毒鼠强

,吴国平,王军
色谱 , 2003,
Abstract: 研究了固相膜萃取 气相色谱测定尿液、血液中毒鼠强的方法。样品经固相膜吸附,然后经溶剂洗脱、蒸发浓缩定容,最后进行气相色谱分析。该法操作简便、结果准确可靠,能有效排除杂质的干扰。毒鼠强在尿液和血液中的平均回收率分别为86 4%和83 4%,检出限分别为0 1ng和2ng。
基于约束边长FART-Q的智能决策算法
,龚光
北京航空航天大学学报 , 2015, DOI: 10.13700/j.bh.1001-5965.2014.0076
Abstract: 针对模糊自适应共振理论(ART)应用于智能决策时存在的问题,提出了约束边长的模糊ART算法.将有边长约束的模糊ART与Q学习结合,构建了约束边长FART-Q(FuzzyART-Qlearning)智能决策网络.传统的模糊ART只根据输入向量与权值向量的模糊相似度进行分类,在用于智能决策中的状态分类时,不能考虑状态变量的物理含义,存在分类不合理的问题.针对这一问题,提出了对模糊ART的共振条件加入边长约束的改进算法,使得分类时可根据状态变量的物理含义确定分类的边长约束,同时能够减少分类数量.雷区导航仿真实验表明,约束边长FART-Q能快速做出合理决策.改进的模糊ART算法能够使分类更为合理,既能提高决策的成功率,又可以减小决策的运算时间.
高校科技成果转化制模式的意义,问题及对策
,
科技进步与对策 , 2001,
Abstract: 股份制模式是当前高校科技成果转化中较为成功的一种模式,对我国高校科技成果转化具有深远的意义,但利用此模式促进高科技成果转化也存在一些问题,提出了完善高校科技成果转化股份制模式的若干建议。股份制模式高校科技成果转化
高青县南部地区地热资源评价
,郝凌霄,陈康
南水北调与水利科技 , 2014,
Abstract: 高青县南部地区的热储层主要为新近系馆陶组和古近系东营组。通过野外勘察和室内分析结果,选取合理的计算参数,建立了热储概念模型。在此基础上,分别利用热储法、回收率法对研究区内的地热资源量和可利用地热资源量进行计算评价,同时利用体积法、最大降深法对地下热水的储存量和允许开采量进行了计算评价。结果显示,研究区地热资源量总量为2.5161×1018j,折合标准煤8.587×107t;回收率采用25%,计算得可利用地热资源量为6.290×1017j,折合标准煤2.147×107t;地下热水储存量为6.542×109m3,其中允许开采量为3.833×106m3/a(开采年限为100a)。
高血压与糖尿病对动脉弹性指数及循环内皮微颗粒影响的对比研究
黄榕
南方医科大学学报 , 2010,
Abstract:
基于多层混合结构的ipv6路由表查找算法
,
计算机应用 , 2013,
Abstract: ?针对现有的大多ipv6路由表查找算法采用各种优化手段提高查找性能,却使得路由更新需要重构整个路由表的问题,提出基于多层混合结构的ipv6路由表查找算法。该算法在第一层借鉴最优查找树的优点,把前缀1~16位的不同取值按其在路由表中出现的概率降序存储在线性表中,在第二、三层把前缀的17~32位和33~48位分别用二叉平衡树组织,在第四层把49~64位使用线性表组织。实验结果表明,该算法查找速度快,占用内存少,动态增量更新速度快。
显微分光光度计分析文件中印章与签字形成的时序
Time Sequence of the Formation of the Seal and Signature of the Microspectrophotometer
 [PDF]

,, 唐凯敏
Instrumentation and Equipments (IaE) , 2015, DOI: 10.12677/IaE.2015.34023
Abstract: 本实验主要采用显微分光光度计分析书写字迹与印章形成的时序,结合显微照相技术拍取文件的二维照片,运用透射光谱法对时序不同的文件进行检测,分别探讨了黑笔与蓝笔形成文件的先后顺序特征,并将文件正面与反面检测方式作了比较。实验结果表明,采用显微透射光谱法,时序不同的样品在400~750nm透射率不同,朱墨交叉处与白纸、印泥、书写色料的色差值大小不同,结合样品照片的特征比较,可将其有效的区分。该法快速、准确、不损坏样品,能够有效鉴别黑笔或蓝笔与印章形成文件的时序。
The time sequence of writing and seal formation was analyzed by microspectrophotometer, and the time sequence of different files was detected by using the transmission spectrum method in this experiment. Experimental results showed that the transmissions of samples from different time could be detected between 400 and 750nm. The values of the red seal mixed with the ink, the white paper and the writing pigment color were different. Compared with the characteristics of the sample photos, they could be distinguished effectively. The method was effective, accurate and was harmless to the samples. The time sequence of black pen or blue pen and seal formation could be identified effectively with the method.
Dynamic Environment Economic Dispatch Based on Differential Evolution Algorithm
基于差分进化算法的动态环境经济电力系统调度优化

孙成富,海岩,
计算机科学 , 2012,
Abstract: Dynamic environment economic dispatch is of non-linear optimization problems. It represents the characteris- tics of multi-objective,high dimensions and constraints. So the traditional methods are no longer fit to solving these op- timization problems. A price penalty factor approach was utilized here to convert the bi-objective problems into single objective ones. In order to handle constraints effectively,heuristic rules were proposed to handle ramp rate constraints, and heuristic strategics based on priority list arc employed to handle active power balance constraints. The heuristic strategics also can increase the variety of the individual and extend the search scope. I}he thermal unit with the lower average full-load cost will have the higher priority to dispatch more generation power in the heuristic strategies based on priority list, so that the even better scheduling solutions can be obtained. At last, the differential evolution algorithm was improved to enhance the search ability and improve the solution quality.
中国大陆绒螯蟹线粒体16SrDNA序列变异与分子鉴定标记
,,陆健健,杨光
自然科学进展 , 2002,
Abstract: 选取了中国大陆东部6个水系合计110个绒螯蟹个体,通过DNA序列测定和PCR/RFLP分析,对线粒体16S rDNA部分片段的序列变异进行研究.结果表明,在401bp的16S rDNA片段中,合浦绒螯蟹(Eriocheir japonica hepuensis)与中华绒螯蟹(E.j.sinensis)之间存在3~4个固定的碱基替代;合浦绒螯蟹的闽江、九龙江和南流江种群之间未发现碱基变异,表现为1种单元型(C型);中华绒螯蟹长江和辽河的种群中,有1个固定的碱基替代,表现为A,B两种单元型.单元型之间的碱基变异反映了绒螯蟹地理种群之间的遗传歧异.经Dra I酶切形成的16S rDNA酶切片段差异,为2个亚种的鉴定提供了一种准确、简捷的DNA分子标记.对长江水系部分水域绒螯蟹的分子鉴定提示,长江下游至长江口以中华绒螯蟹的2个单元型为主,但已混有合浦绒螯蟹的单元型.在江苏、安徽渔场中的饲养种群分别属于单元型A型和B型.16S rDNA的PCR/RFLP差异可作为正确鉴定中华绒螯蟹和合浦绒螯蟹的分子鉴定标记;16S rDNA片段中1个固定位点的碱基替代可作为区分中华绒螯蟹两种单元型的分子鉴定标记.
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