高柔悬臂结构损伤识别的约束柔度法

为了识别高柔悬臂结构的损伤位置和损伤程度,提出损伤识别约束柔度法。推导出等效抗弯刚度分别与柔度矩阵各元素和与任一阶模态参数的关系等式,基于任一阶模态参数,将高柔悬臂结构简化为弯曲型集中质量模型,分析基于弯曲型集中质量模型的损伤识别柔度法的病态性,引入约束条件,建立低病态性的方程组,通过解方程组识别损伤。数值算例表明,所提方法识别效果较好,明显改善了损伤识别柔度法的病态性。     

傅立叶变换红外光谱法检验塑料编织袋的研究

利用傅立叶变换红外光谱仪,采用Smart Performer采样器,对50个不同用途、不同产地的塑料编织袋样品进行分析检验。依据红外光谱图中吸收峰的不同,可以将高分子材料(塑料编织袋)样品分为两大类,每一类又可以根据吸收峰的峰数、峰位置、峰形和相对峰高比的不同进一步加以区分,同时考察了这种方法的重现性和最小检出量。实验结果表明,傅立叶变换红外光谱检测法不破坏检测材料,重现性好,可用于鉴定高分子材料(塑料编织袋)物证。     

基于RFID的射频识别器

基于射频识别技术,根据RFID内部结构及工作原理设计了一个射频接收装置,它可以读、写射频卡中的数据,具有良好的加密效果。     

基于SPSS的主成分分析在复杂碎屑岩油水层识别中的应用——以准噶尔盆地腹部中1区为例

研究区位于准噶尔盆地腹部的昌吉凹陷,地质条件复杂,储层非均质性强,以低孔低渗储层为主,油水层识别困难,普通的油水层识别图版不能取得理想的效果;在分析了油水识别困难的成因机理的基础上,引入主成分分析方法,以SPSS软件为平台,充分利用已有钻井、完井、试油等资料,选取能反映含油性的深、中感应电阻率;反映储层物性的声波、补偿中子和反映泥质参数的自然电位、自然伽马等测井曲线,建立油水层判别分析模型进行测井解释,与试油结果比较,效果较好。     

Determination of the Mass Diffusion Coefficient Based on the Relative Humidity Measured at the Back Face of the Sample During Unsteady Regimes

This work proposes a new method for the determination of the mass diffusion coefficient in hygroscopic materials. The experiment consisted of submitting one face of the sample to a variation in time of the relative humidity (RH) and measuring the RH on its back face. The imposed RH and temperature were measured during the test and served as boundary conditions in a comprehensive computational code to solve heat and mass transfer in porous media. This model uses a physical engine embedded in the inverse procedure to determine the mass diffusion coefficient. Compared with classical methods, this new method has several advantages:

• It allows several samples to be measured simultaneously, simply by multiplexing the RH sensors.

• Accurate values can be obtained even when starting and ending out of equilibrium, which allows the characterization time to be drastically reduced.

• The external mass transfer coefficient has a negligible effect on the identified value.

• Nonstandard Fickian behaviors can be detected by the disagreement between the measured and simulated curves.

The results show that the diffusivity obtained for spruce wood is in good agreement with those found with classical methods. In contrast, the fiber board results differed between the experiment and model, or yielded unrealistic values, which confirms the dual-scale nature of mass transfer that occurs in this kind of material.     

近红外漫反射光谱法快速鉴别药用辅料

本文建立了采用近红外光谱法对41种常用药用辅料进行快速、准确、无损鉴别的方法,每个品种6批次样品共得246张光谱,215张用于建立模型,41张用于验证模型。在3966~10414cm-1的范围内,使用二阶导数9点平滑光谱预处理方法,结合第一范围标定法建立的“总库1”定性分析模型可准确鉴定30种辅料,其余5大类11种辅料被直接转入“子库2-6”进一步鉴定,直至完全分离。结果表明,对验证集样品鉴别准确度达100%。对比于操作繁琐、费时的传统检测方法,该方法快速、准确,适用于制药企业在原料进厂时逐桶定性鉴别和车间投料的过程控制。     

An identification study of vermiculites and micas: Adsorption of metal ions in aqueous solution

This study deals with the identification of vermiculite in the presence of mica. Three natural silicates were first subjected to expansion by rapid heat treated at 400 °C. Then, the starting silicates and their derived heat-treated products were analyzed by X-ray diffraction, FT-IR spectroscopy, N₂ adsorption at − 196 °C, and helium density measurement. The adsorption of cadmium, chromium, and lead was also carried out. Two of the silicates are composed of mainly biotite and the other of biotite and vermiculite. In general, the results of X-ray diffraction, FT-IR spectroscopy, and helium density measurements are well in agreement. The heat treatment at 400 °C has little effect on the chemical composition, structure, and texture of the silicates. The development of microporosity is small in the silicates. Surprisingly, the adsorption capacity toward chromium and lead is larger for the biotite silicate than for the vermiculite containing silicate.     

抗转铁蛋白受体鼠源性单链抗体基因的构建、表达及初步鉴定

目的　利用基因工程技术将鼠源性单克隆抗体WuT9改造成单链抗体。方法　从分泌抗CD71单克隆抗体的杂交瘤细胞WuT9中提取总RNA ,采用OligodT为逆转录引物 ,逆转录合成cDNA第一链 ,然后分别采用VL 和VH 框架区的PCR引物 ,扩增VH(重链可变区 )和VL(轻链可变区 )DNA片段 ,利用事先合成的存在于VL 下游引物和VH 上游引物的部分人工连接子重叠互补序列 ,将VL 和VH 的PCR回收产物进行部分重叠PCR(SOE) ,形成单链抗体基因。最后将此基因重组进表达载体pBAD gIII C中 ,经L arabinose(左旋阿拉伯糖 )诱导表达并初步鉴定。结果　构建出 70 0bp左右的单链基因 ,并获得阳性重组表达载体克隆 ,表达产物为相对分子质量 2 70 0 0左右的蛋白分子。结论　经因特网查询表明 ,单链抗体基因重链部分属于小鼠H链可变区ⅠA亚组 ;轻链属于小鼠κ轻链可变区Ⅱ亚组 ,此单链抗体基因的表达产物具有一定的特异结合活性。本研究为抗CD71单链抗体的临床应用打下了基础。     

海上溢油的鉴别及其修复

针对海上溢油事故时有发生,严重威胁海洋生态环境,介绍了溢油鉴别通常采取的策略,即微量组分鉴别、＂指纹＂鉴别和DNA标记,并作出对比。尽管有很多因素限制,但采取溢油＂指纹＂分析的策略仍是最实用的方法。此外,为治理溢油造成的污染,系统介绍了溢油污染的修复。     

乌尔逊凹陷三级层序地层特征及沉积相带展布规律——以乌北次洼南屯组为例

总结南屯组地层层序、体系域的识别与划分标志,将目的层自下而上划分为2个三级层序,建立层序地层格架,并根据初次湖泛面和最大湖泛面特征将每个层序进一步划分为低位域、水进域和高位域三个体系域。通过对地震、岩心、钻、测井资料综合分析,识别出乌尔逊凹陷乌北地区南屯组发育扇三角洲相、辫状河三角洲、湖泊相等三种沉积相类型。其中辫状河三角洲发育在湖盆的东缘缓坡带,扇三角洲主要发育在西缘陡坡带。