Innovative hydrogen release from sodium borohydride hydrolysis using biocatalyst-like Fe2O3 nanoparticles impregnated on Bacillus simplex bacteria

For the first time in this innovative study, microorganisms such as Bacillus simplex bacteria, mostly used in biological activity studies, are used as a bio-supporter agent of iron to release hydrogen from sodium borohydride hydrolysis at 25.0 ± 0.1 °C. The goal is to investigate thoroughly sodium borohydride hydrolysis catalyzed by Fe₂O₃ nanoparticles impregnated on microorganism such as Bacillus simplex (BS) bacteria (Fe₂O₃@BS NPs) known with strong antibacterial properties, which makes innovative them a candidate for hydrolysis reaction. This study was focused on the preparation, identification, and catalytic use of biocatalyst-like Fe₂O₃@BS NPs for hydrogen release from the sodium borohydride hydrolysis at 25.0 ± 0.1 °C. The characterization results made after and before hydrolysis reaction using by SEM/SEM-EDX, FT-IR, XRD, UV–vis, XPS, DLS, ELS Zeta potential, ESR, and TEM techniques reveal the formation of highly active, stable, durable, and long-lived biocatalysts-like Fe₂O₃@BS NPs.     

基于端元提取的高光谱影像特定目标识别

高光谱遥感影像中特定目标的识别与提取实际上是从背景图像中有效提取所需目标的过程。“纯净”波谱终端单元（端元,Endmember）选择的结果能有效地描述只含有单一纯粹物质的像元点。高光谱处理技术能够基于真实的物理模型进行波谱提取、比较分析、识别目标。结合AVIRIS高光谱影像实例,分析了高光谱遥感影像n维空间里的单形体理论,运用影像灰度值定标可为反射率、最小噪声分离（MNF）、纯净像元指数（PPI）、终端单元选择、n维散度分析、波谱角度度制图（SAM）等高光谱数据处理技术实现对特定目标的识别与提取。     

数值流形方法中的几点改进

简述了岩石力学中的数值流形方法及其分析过程，并就流形方法的具体实施作了几点改进，给出了相应的公式和算例。     

基于观测域平方根UKF的机载无源定位算法

针对机载无源定位存在滤波稳定性差、收敛速度慢、定位精度低等问题,提出一种观测域平方根UKF滤波算法,新算法充分利用了观测域滤波的自动解耦功能和平方根UKF良好的数值稳定性及非线性滤波能力,并通过最小偏度单形采样的UT变换减少了算法在状态域与观测域之间转换时存在的舍入误差,同时也提高了算法的运行效率。仿真结果表明新算法提高了滤波稳定性、收敛速度和定位精度。     

基于无需测速的单纯形法微地震定位改进研究

 在综合分析传统单纯形法及目前微地震定位算法选用的各类速度模型及其相关误差的基础上,提出一种无需测速和反演的速度模型,并基于此对传统单纯形法进行微地震定位改进研究,结合不同速度模型、不同迭代算法在差异化速度误差和速度各向异性变化条件下的定位精度进行算例分析和工程验证,研究结果表明：无需测速和反演的速度模型能有效避免传统速度反演模型在速度反演过程中的方法误差和现场测速造成的测速误差,将其应用于传统单纯形法,不仅能有效避免传统单纯形法易陷入局部最优的问题,充分发挥单纯形法迭代易收敛的优势,且对于检波器阵列外的震源进行定位时相比其他迭代方法求解时定位精度显著提高,可为微地震定位领域提供一种新的研究思路。     

一种基于最优算法的导弹鲁棒稳定性评估方法

在对参数不确定性导弹控制系统进行多通道鲁棒稳定性评估时,传统方法在计算效率及结果可靠性方面存在不足。提出一种遗传-Nelder-Mead单纯形混合优化算法,利用遗传算法的全局搜索能力,寻找目标函数的近似最优解,并将其作为Nelder-Mead单纯形法搜索的初值,利用Nelder-Mead单纯形法局部寻优的优势,在近似解的邻域内搜索精确解。通过测试函数验证,算法在计算效率和计算精度方面都有很大提升。最后讨论了算法在导弹控制系统鲁棒稳定性评估中的应用价值。     

Dendrimer as nanocarrier for drug delivery

Dendrimers are novel three dimensional, hyperbranched globular nanopolymeric architectures. Attractive features like nanoscopic size, narrow polydispersity index, excellent control over molecular structure, availability of multiple functional groups at the periphery and cavities in the interior distinguish them amongst the available polymers. Applications of dendrimers in a large variety of fields have been explored. Drug delivery scientists are especially enthusiastic about possible utility of dendrimers as drug delivery tool. Terminal functionalities provide a platform for conjugation of the drug and targeting moieties. In addition, these peripheral functional groups can be employed to tailor-make the properties of dendrimers, enhancing their versatility. The present review highlights the contribution of dendrimers in the field of nanotechnology with intent to aid the researchers in exploring dendrimers in the field of drug delivery.     

Mixing and Simplex Search for Optimal Illumination in Machine Vision

Mixed-color illumination affects the quality of images in industrial vision system and it is important to optimize color and intensity for image acquisition. This study used simplex search to find the optimal illumination in a short amount of time. A typical color mixer synthesized various color of lights by changing the inputs of RGB power LEDs and passing the lights through an optical system. The image quality under mixed-color illumination was calculated according to the sharpness. For the purpose of optimal illumination using simplex search, a probe network was organized with N + 1probing points for N inputs. The shape of the probe network, simplex, was varied through procedures of extension, contraction, and shrinkage. The inputs of the color mixer were changed until the size of the simplex became smaller than a threshold. The simplex search was tested for commercial semiconductor patterns, and was useful for finding the optimal illumination.     

单纯形法在准理想级联优化中的应用

已知目标组分的精料和贫料丰度，确定准理想级联的结构，即确定级联流量分布、级联总级数以及供料级位置，是约束条件下的多变量优化问题。通过罚函数法把约束条件下的多变量优化问题转化为无约束优化问题，并用单纯形法对后者进行了求解。利用该优化方法对浓缩回收铀的级联进行了计算。     

卫星通信网仿真业务源建模研究

该文首先提出从单用户业务和汇聚业务两方面建模卫星通信网络承载业务的方案。其次,建立了单用户业务源的统一参考模型,给出了描述各种主要业务类型特性的模型参数。然后,分析了汇聚业务的相关特性,给出了描述汇聚业务流自相似特性的几种模型,并对模型进行了比较分析。