一种高性能红外机芯的实现方法

文章介绍了一种基于ADI公司DSP芯片的高性能红外机芯的设计方法.设计中采用小波变换进行图像增强,并在硬件上实时实现了该方案.文章描述了为实现机芯的信号处理而进行的软件和硬件实现流程.     

海洋二号卫星工程研制及在轨运行简介

海洋二号卫星是我国首颗海洋动力环境探测卫星,也是目前国际上唯一一颗可全天候、全天时同步获取全球海面高度、有效波高、海面风场、海面风速、海面温度、大气水汽含量、云中液水含量等多种遥感数据的卫星。海洋二号卫星配置4种主、被动微波遥感载荷,采用全新遥感体制,实现关键部件国产化,具有精密测定轨、电磁兼容、高精度姿态控制等技术特点。海洋二号卫星作为国内首颗综合型微波遥感卫星,其工程实现意义重大。本文从系统组成与功能、研制阶段划分、大型试验验证、在轨测试与应用成果展示几个方面进行了介绍。     

不同固定化菊粉酶方法的比较及条件优化

采用聚乙烯醇-海藻酸钙(PVA-CA)凝胶包埋法、壳聚糖交联法、D201-GM阴离子大孔树脂吸附交联法及人造棉绒布共价偶联法对菊粉酶进行固定化。通过对四种方法的对比得出最佳固定化方法为D201-GM阴离子大孔树脂吸附交联法,其固定化酶酶活力、酶活力回收率及操作稳定性均优于其它三种方法。以D201-GM阴离子大孔树脂为载体,对影响菊粉酶固定化的重要因素进行了考察,获得最佳固定化条件。实验结果表明,在pH为5.4,载体与酶的比例为1:2的条件下,振荡吸附3h后,加入0.5%(终浓度)戊二醛,15℃交联4h时即可获得较好的固定化效果。     

着陆雷达自适应滤波器设计及DSP实现

针对某型着陆雷达的工作环境和其杂波特点,为了实现对杂波的抑制,目标的显现,设计了一种自适应信号处理算法,该算法采用滤波器组分段处理不同区域信号,并设置了不同类型的杂波进行了MATLAB仿真,验证了算法的有效性,最后用先进DSP芯片TS201对该算法进行了实测验证;实验证明采用这种算法运算量小,实时性高,滤波效果好,具有很高的实用价值。     

镍201板对接焊接技术

采用手工钨极氩弧焊对镍201进行焊接,焊接材料选取化学成分与镍201基本相同、强度级别相当的ERNi-1焊丝。镍201的物理性能特点是热导率低、膨胀系数高以及焊缝金属流动性差,在对接焊时应采用更大的V型坡口、坡口角度70°。焊接过程中采用小的焊接线能量、短电弧焊接,层间温度小于100℃。焊接完成后进行一系列检测,主要有无损检测、力学性能检测和微观金相检测。结果表明,采用合理的焊接工艺,各项性能指标均满足标准要求。     

(Ut)opiates: Rethinking Nature

Much of what is currently regarded as ‘green’ is predicated on a pre-modern, even Romantic, notion of nature; with sustainable design often overtly seeking to readdress the balance in nature by countering man's destructive forces. Here, Fabiola López-Durán and Nikki Moore pursue a more nuanced view of sustainability and architecture through a lineage of ideas, embedded within Lamarckian eugenics - the early 20th-century movement that sought the advancement of the human race through the transformation of the environment. Copyright © 2010 John Wiley & Sons, Ltd.     

Inclusion complexes of atorvastatin calcium (ATV-Ca) and rosuvastatin calcium (ROV-Ca) drugs with α-CD, β-CD, γ-CD,HP-β-CD,M-β-CD,and maltodextrin along with their characterizations through experimental and computational methods

The aim of this research is a comparison of the efficiency of six commercially available cyclodextrins (CDs) to improve the solubility and oral bioavailability of atorvastatin calcium (ATV-Ca) and rosuvastatin calcium (ROV-Ca) drugs in aqueous media. Inclusion complexes of both drugs with non-toxic α-CD, β-CD, γ-CD, HP-β-CD, M-β-CD, and maltodextrin were prepared in a 1:1 stoichiometry via the kneading method. To reach the best CD, various experimental and computational analyses were performed including phase solubility, dynamic light scattering (DLS), Fourier transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD), differential scanning calorimetry (DSC), scanning electron microscopy (SEM), atomic force microscopy (AFM), hydrogen-1 nuclear magnetic resonance (¹HNMR), carbon-13 nuclear magnetic resonance (¹³CNMR), and molecular docking calculations. The M-β-CD turned out to be the best substrate for the micro-encapsulation of both drugs. Also, ATV showed a higher tendency than ROV to form inclusion complexes with CDs. Molecular docking studies showed that HP–β–CD and M-β-CD are the most suitable substrates for the formation of inclusion complexes, respectively. Our research showed that the β-CD is not necessarily the most efficient substrate for increasing solubility based on previous reports in the literature; meanwhile, the other employed substrates in this study can show acceptable performances in this regard. According to our results, M-β-CD is the best substrate for the micro-encapsulation of both drugs, which increases their solubility in water.