竖直振动管中颗粒的上升运动

通过实验和数值模拟研究了竖直振动管中颗粒的受激运动.将一直管插入静止的颗粒料层中,并在管内预填充一定高度的颗粒,对直管施加竖直振动.振动强度较弱时,管内的颗粒在重力作用下向下运动;当振动达到一定的强度时,管内颗粒不下降反而克服重力的作用向上运动,随着振动强度的进一步提高,即使不在管内预填充高于颗粒床层的颗粒,颗粒也会沿着振动管逆重力向上运动.颗粒的上升高度与运动速度强烈依赖于振动强度.通过高速相机记录颗粒和直管在单个振动周期内的运动,并结合离散元(DEM)法模拟管内颗粒的受力变化规律,给出了颗粒上升的机理.此研究对实现散体物料的定向输运提供了一种新方法.     

Use of Adhesive for the Retention of a Rough-Surfaced Particle on a Solid Support

In a study of the rate of dissolution in water of a single detergent granule, an unexpected experimental artefact was encountered. The granule, attached to a solid support by adhesive, was found on dissolution to leave behind a thin shell or skin. The formation of this residue can be attributed to the capillarity-induced spreading of the uncured adhesive over much of the granule surface due to its irregular surface morphology. No such effect was found with smooth, spherical particles of comparable size. This residue would be likely to modify the observed dissolution process.     

基于优化辅助粒子算法的红外目标跟踪研究

针对粒子算法存在的问题,提出了辅助粒子算法.该算法在重采样算法基础上,引进辅助变量,对粒子的权2次计算,可使粒子权值比重采样的粒子权值变化更稳定,最后给出了红外目标模型和均方根误差函数.仿真结果表明该算法对运动目标跟踪的均值和方差上均优于标准粒子滤波、重采样粒子滤波,且提高了计算效率.     

基于正则粒子重采样算法的红外成像消噪处理

 针对红外成像消噪的粒子滤波退化问题,提出正则粒子重采样算法。该算法从粒子群重采样获得粒子云(xjk,nj)mj=1,解决了粒子多样性消失的问题并克服粒子匮乏的现象;接着又通过添加辅助粒子v,将下一时刻观测值权值大的粒子进行标识,使粒子权值ωik∝p(xk｜yik-1)p(xk｜μik-1)更加稳定;给出了运动物体的红外成像消噪模型。实验仿真表明：正则粒子重采样算法通过添加辅助粒子使红外成像消噪效果好,成像清晰度在95%以上。     

Starch Granule Size and Morphology of Arabidopsis thaliana Starch-Related Mutants Analyzed during Diurnal Rhythm and Development

Transitory starch plays a central role in the life cycle of plants. Many aspects of this important metabolism remain unknown; however, starch granules provide insight into this persistent metabolic process. Therefore, monitoring alterations in starch granules with high temporal resolution provides one significant avenue to improve understanding. Here, a previously established method that combines LCSM and safranin-O staining for in vivo imaging of transitory starch granules in leaves of Arabidopsis thaliana was employed to demonstrate, for the first time, the alterations in starch granule size and morphology that occur both throughout the day and during leaf aging. Several starch-related mutants were included, which revealed differences among the generated granules. In ptst2 and sex1-8, the starch granules in old leaves were much larger than those in young leaves; however, the typical flattened discoid morphology was maintained. In ss4 and dpe2/phs1/ss4, the morphology of starch granules in young leaves was altered, with a more rounded shape observed. With leaf development, the starch granules became spherical exclusively in dpe2/phs1/ss4. Thus, the presented data provide new insights to contribute to the understanding of starch granule morphogenesis.     

固相转晶合成含硼CF-2沸石过程中甲胺分子的状态变化

以¹³C MAS NMR与TG-DTG为主要手段,研究了多孔玻璃粉于蒸汽相中转变为含硼CF-2沸石过程中模板剂甲胺分子的状态变化.结果表明甲胺分子经历了三种状态变化:在反应初期,甲胺分子与多孔玻璃表面羟基形成弱相互作用;随着反应进行,一部分弱相互作用的甲胺分子转变为强相互作用的甲胺分子;强相互作用的甲胺分子与硅羟基、铝羟基、硼羟基共同形成CF-2沸石晶核,晶核长大成晶体,甲胺分子进入沸石孔道内,此时存在与多孔玻璃粉表面羟基弱相互作用、强相互作用以及处于沸石孔道内的三种甲胺分子.随着结晶度进一步升高,多孔玻璃表面弱相互作用与强相互作用的甲胺分子依次逐渐消失,最终全部进入CF-2沸石孔道内.孔道内有自由状态和质子化的甲胺分子.SEM照片从形貌上直观地表征了多孔玻璃向CF-2沸石的转变过程.     

板蓝根颗粒的红外光谱无损快速鉴别及可视化表达

用傅里叶变换红外光谱对传统中成药板蓝根颗粒进行了研究。对同一厂家不同批次和不同厂家的板蓝根颗粒主要成分板蓝根和大青叶的红外光谱图及二阶导数谱图进行了比较分析,并将谱图进行可视化表达。结果显示,傅里叶变换红外光谱法结合二阶导数谱和谱图的可视化,能够有效地提取配方颗粒的特征指纹谱图,直观地反映出不同生产厂家产品质量的差别及同一生产厂家不同批号产品之间谱图的可重现性,从而实现中成药的无损快速鉴别,为中成药质量检测及监控提供一种方便、有效和直观的方法。     

基于粒的二进制运算的关联规则提取方法

讨论了信息粒及其实例。建立了粒与二进制数的对应关系。定义了粒计算与二进制数计算的相似性和互换性，因此用粒计算方法作决策被转换为用二进制计算方法来提取关联规则。这样不仅是速度快，而且效率高。     

贫血冲剂对脾虚模型小鼠全血微量元素变化探讨

对常用６１种中药作微量元素检测．发现补血滋肾类药铁含量丰富，而健脾益气类药铁和锌含量均高．制备脾虚模型小鼠以贫血冲剂喂养一周及二周，分别检测其全血中铁、锌、钙含量．发现喂养一周．脾虚组与对照组全血铁，锌．钙含员变化不大（Ｐ＞０．０５），而喂养二周，脾成组全血铁、锌、钙含量明显高于对照组（Ｐ＜０．０５）。     

反相高效液相色谱法测定康肾颗粒中的葛根素

建立了反相高效液相色谱分离、质谱定性、紫外检测定量测定康肾颗粒中葛根素含量的方法。采用YMC-ODS色谱柱(4.6 mm i.d.×100 mm,10 μm),选用甲醇(含0.1%三氟醋酸)和水(含0.1%三氟醋酸)体系为流动相,非线性梯度洗脱分离,流速1.0 mL/min,检测波长250 nm;用基质辅助激光解吸离子化飞行时间质谱(MALDI-TOF MS)分析鉴定对照品和样品的馏分,在确定目标峰后进行紫外检测定量测定。结果表明,葛根素在0.132 ~1.32 μg范围内其峰面积与进样量呈良好的线性关系（r=0.9997）,平均加标回收率高于103%,相对标准偏差低于2.0%(n=6)。应用该方法测定康肾颗粒中葛根素,其平均含量为3.09 mg/g。该方法简单、快速、重现性好。