粉末X射线衍射鉴定一种重整催化剂的晶体物相

采用粉末X射线衍射(PXRD)鉴定了一种载担型铂催化剂的晶体物相,并应用化学计量学峰形拟合法和Scherrer法计算了其中铂的晶粒尺寸。其主要物相鉴定结果为:铂(Pt)、氧化铝(γ-Al2O3)。Pt(111)晶面晶粒尺寸为10.4nm。X射线荧光光谱(XRF)分析该催化剂中Pt的质量分数为0.25%。     

一种鞋面材料的成分分析

用有机溶剂萃取方法分离和提纯样品,通过傅立叶变换红外光谱仪器对一种鞋面材料中的各种组分进行测试,并对测试结果进行综合分析,给出分析结果。     

一种玻璃清洗剂的化学成份分析

采用化学分离方法结合红外吸收光谱法对一种玻璃清洗剂的化学成份进行检测分析.分别采用乙醚、丙酮、甲醇等有机溶剂对样品进行分离处理,通过BRUKER VECTOR33傅里叶变换红外光谱仪进行测试,对分离后各组份的红外光谱特征进行解析,给出样品的定性和定量分析结果;对各组份在清洗剂产品中的功能进行了分析说明.     

仪器分析在甲壳素与壳聚糖及其衍生物中的应用

综述红外光谱、紫外光谱、核磁共振、质谱、扫描电镜、X射线衍射在甲壳素与壳聚糖及其衍生物的官能团、结构、形貌等研究中的应用,并对仪器分析在甲壳素与壳聚糖及其衍生物中的应用和发展前景进行展望。     

复合膜包装袋材质的识别

用有机溶剂浸泡药物和奶粉两种复合膜包装袋,让其每一层分开。经FT-TR仪及X射线萤光光谱仪检测,结果表明:药物包装袋内层膜的材质是聚乙烯(PE),外层膜的材质是聚丙烯(PP)。奶粉包装袋内层膜的材质是PE;中间层是金属铝膜;外层膜的材质是聚对苯二甲酸乙二醇酯(PET)。     

激光等离子体软X射线光源的一种诊断方法

激光等离子体软X射线光源是脉冲式光源,对这类光源的光谱诊断有几种方法.文章介绍了一种新的、实用的测量激光等离子体软X射线光源光谱的方法.此方法以低噪声的通道电子倍增器探测来自光源的ns量级的脉冲光信号,并由低噪声、响应快的电荷灵敏前置放大器进一步将其放大,前放的输出电荷与输入的脉冲信号的峰值成正比.使用这种方法测量了铜靶激光等离子体光源和氧、氪气体靶激光等离子体软X射线源在8～30nm波段的光谱.     

一种基于EMD的对比度增强方法

针对低对比度X射线图像的增强和缺陷检测问题,结合X射线图像的特点,分析了影响X射线质量的因素,提出了一种基于EMD的对比度增强方法.     

铝碳酸镁及其伪品的结构鉴定

采用傅里叶变换红外(FTIR)光谱法和X射线衍射法对4个铝碳酸镁样品进行了结构分析。结果表明,4个样品中,有2个是真品,有2个是伪品。结论:FTIR光谱法和X射线衍射法可快捷、准确地鉴别铝碳酸镁及其伪品。     

几种测量纳米粒子粒径方法的比较研究

以纳米碳酸钙粒子作为测量对象,分别采用x射线衍射法(XRD)、透射电子显微镜法(TEM)及原子力显微镜法(AFM)测量其粒径.结果表明:x射线衍射法测量的纳米粒子粒径可能小于纳米粒子实际平均粒径,透射电子显微镜法和原子力显微镜法测量的纳米粒子粒径可能大于纳米粒子实际平均粒径.分析探讨了3种方法的应用领域、测量范围、优缺点等.     

一种确定X射线能谱仪(EDS)分析中接收角的方法

利用扫描电镜中物镜电流与焦距的关系，通过实验和计算得出了物镜电流调节旋钮刻度值与样品微区高低位置的对应关系。利用该关系得到了一种确定接收角的方法。该法易于应用且适于一些特殊样品接收角的确定。     

牵引车-半挂车列车稳态转向特性的判别方法

研究3种用于判别牵引车-半挂车列车稳态转向特性的方法线性系统稳态转向特性判别方法、非线性系统稳态转向特性的判别方法、能量相平面判别方法。3种方法相互补充,可以全面判别牵引车-半挂车列车的稳态转向特性。     

Error analysis of an algorithm for identifying thermal fatigue cracks

This paper analyzes the effect of changes in the key parameters of an algorithm for identifying cracks in images of rolls of continuous casting machines. The effects of the background threshold of binary conversion and the filter kernel size on the total error of calculations of geometric characteristics of cracks are considered. The range of crack lengths for which the developed algorithm is suitable is calculated based on experimental data.     

RP-HPLC法同时测定注射用替卡西林钠克拉维酸钾中两个主成分的含量

目的:建立同时测定注射用替卡西林钠克拉维酸钾中两个主要成分含量的RP-HPLC方法。方法:采用SB-Aq色谱柱(250mm×0.46mm,5μm);流动相为0.05mol/L磷酸二氢钠溶液(pH5.2)-0.05mol/L磷酸二氢钠溶液(pH4.3)-乙腈,进行梯度洗脱;流速1.0mL/min,柱温25℃,检测波长220nm。结果:标准曲线中替卡西林和克拉维酸的浓度分别为103.7～311.1μg/mL和6.666～20.00μg/mL;相关系数分别为0.999和0.999;平均加样回收率(n=9)分别为99.6%和99.3%。结论:该方法准确性好、灵敏度高、重复性好,可有效控制药品生产质量。     

燃气取暖器的自动点火和缺氧保护设计

燃气取暖器的点火方式一般是手动的，该文介绍一种通过单片机控制来实现自动循环点火和缺氧保护的燃气取暖器的硬件和软件设计，它克服了手动式取暖器点火操作不便，控温不精确和不能显示温度等缺点，并具有自动报警功能。     

聚丙烯粉料中挥发性组分的项空气相色谱法测定

建立了用项空气相色谱法测定聚丙烯粉料中挥发性组分含量的方法（平衡温度75℃,平衡时间1h）。本方法的相对标准偏差＜1．64％,与日本三井油化企业标准PP－F-119相比无显著差异。     

基于3D特征造型的高压辊磨机关键结构CAD技术研究

这里通过分析CAD技术在工程和产品设计中所起的重要作用,提出了基于3D特征造型的高压辊磨机关键结构计算机辅助设计技术,并从产品的零部件设计、有限元分析和优化设计、虚拟装配及产品数据信息管理等方面进行深入的探讨。     

Characteristics of complicated AISI316L automobile components manufactured by powder/metallurgy

Indirect Selective Laser Sintering/Isostatic Pressing (SLS/IP), with Cold Isostatic Pressing (CIPing) and Hot Isostatic Pressing (HIPing) IPs, is adopted for the manufacture of complicated automobile components. The preparation of PA12-coated AISI316L powder and airproof plastic canning during CIPing are also investigated. The influence of technology parameters on the performances of AISI316L specimens during SLS/IP is likewise analyzed. Results show that PA12-coated AISI316L powders are successfully prepared through the dissolution and precipitation process, and that it is better to fabricate airproof canning for complicated components with natural latex. After sintering AISI316L specimens from 1300°C to 1340°C (CIPed at more than 300 MPa ahead), their relative densities increased, approaching 92%. Subsequently, their relative densities are improved by HIPing, whose optimal pressure and temperature parameters are between 90 MPa and 20 MPa, and 1150°C and 1250°, respectively. The optimal tensile performances are close to those of annealed AISI316L compact materials. This paper was presented at the 9^th Asian International Conference on Fluid Machinery (AICFM9), Jeju, Korea, October 16–19, 2007.recommended for publication in revised form by Associate Editor Dae-Eim Kim L. Zhong Liang received his Ph.D. degree from HUST, China, in 2008. Dr. ZhongLiang is currently a Postdoctoral student at XJTU in China, specializing in the investigation of RPM. He has achieved three patents and has published over 10 papers. Of these, five papers have been indexed in SCI. S. Yu Sheng is currently a professor at HUST, China, and is also specializing in the investigation of RPM. He has published more than 100 papers and has achieved more then 20 patents. From his works, 30 papers have been indexed in SCI.     

RP-HPLC法测定复方氨酚烷胺片中4种主要成分的含量

目的建立了复方氨酚烷胺片中盐酸金刚烷胺、马来酸氯苯那敏、对乙酰氨基酚、咖啡因的反相高效液相色谱含量测定方法.方法采用Apollo C18分析柱(5 μm,250 mm×4.6 mm),流动相为0.2%戊环磺酸钠(1%磷酸调pH=3.0)-甲醇(8515);柱温40℃;流速为1.0 mL·min-1;检测波长0～5 min,195 nm;5～15 min,245 nm.结果盐酸金刚烷胺、马来酸氯苯那敏、对乙酰氨基酚、咖啡因的线性范围分别为2.52～504.0 μg·mL-1(r=0.9999)、1.54～308.0 μg·mL-1(r=0.9995)、5.1～1020.0 μg·mL-1(r=1.0000)、1.52～304.0 μg·mL-1(r=0.9998);平均回收率(n=3)分别为99.2%、99.8%、99.6%、99.9%,RSD分别为0.27%、0.41%、0.65%、0.59%.结论采用反相高效液相色谱法同时测定复方氨酚烷胺片中盐酸金刚烷胺、马来酸氯苯那敏、对乙酰氨基酚、咖啡因4种成分的含量,方法准确,结果可靠.     

Product representation for an expert process planning system for rotational components

EXCAP, is a knowledge-based process planning system for rotational components. EXCAP uses its own internal product model coded in Prolog to ensure that all the required information can be represented accurately. This internal product model is called the EXCAP model and is described in detail in this paper.     

Capability of an electromagnetic transducer for multiparameter structuroscopy of steel components

The capability of an electromagnetic transducer for multiparameter structuroscopy is considered theoretically. The multiparameter testing of the structural state using the consumptive magnetic permeability channel is shown to be possible in principle. The error of testing is estimated under nearindustrial conditions using a simulation model and multiparameter structuroscopy is proved to be practically possible.