移动平均市场预测的探索

在原有移动平均线的理论基础上,把一天分成四个时间单位,并利用加权公式算出当天收盘价格H取代简单算术移动平均中的收盘价S进行一次移动平均,在此基础上建立了其二次、三次移动平均法的预测模型。     

有机-无机纳米杂化材料在荧光、光声和拉曼生物成像领域的最新研究进展(英文)

有机-无机纳米杂化材料是一类重要的功能材料,能够在纳米尺度范围内实现有机材料和无机材料本质的复合,可以获得传统材料所不具有的结构、相态、性能和功能,广泛应用于光电、催化、生物医学等领域.本文着重总结了几类有机-无机纳米杂化材料的制备以及它们在荧光、光声和拉曼生物成像领域的最新研究进展,并对该领域将来的发展方向进行了讨论.     

Epidermal growth factor receptor is a cellular receptor for human cytomegalovirus

Human cytomegalovirus (HCMV) is a widespread opportunistic herpesvirus that causes severe and fatal diseases in immune-compromised individuals, including organ transplant recipients and individuals with AIDS. It is also a leading cause of virus-associated birth defects and is associated with atherosclerosis and coronary restenosis. HCMV initiates infection and intracellular signalling by binding to its cognate cellular receptors and by activating several signalling pathways including those mediated by mitogen-activated protein kinase, phosphatidylinositol-3-OH kinase, interferons, and G proteins. But a cellular receptor responsible for viral entry and HCMV-induced signalling has yet to be identified. Here we show that HCMV infects cells by interacting with epidermal growth factor receptor (EGFR) and inducing signalling. Transfecting EGFR-negative cells with an EGFR complementary DNA renders non-susceptible cells susceptible to HCMV. Ligand displacement and crosslinking analyses show that HCMV interacts with EGFR through gB, its principal envelope glycoprotein. gB preferentially binds EGFR and EGFR-ErbB3 oligomeric molecules in Chinese hamster ovary cells transfected with erbB family cDNAs. Taken together, these data indicate that EGFR is a necessary component for HCMV-triggered signalling and viral entry.     

刃前区应力场及刀具前角对其影响的数值分析

本文用有限元法得出正交切削前角γ分别为15°,0°和-15°时的刃前区弹性应力场的数值解。结果表明,在上述三种情况下,应力都分布在刃前区,而且主要为压应力;当γ为15°时的应力场比0°,-15°时远为集中;随着前角的增大,应力分布向“敏感应力状态”变化,这种状态有利于金属分离。     

椭圆起偏器和椭圆迟滞器的Jones矩阵与stokes-Mueller矩阵

用SU(2)群方法找出变换矩阵手T(Θ,Δ),通过T(Θ,Δ)与其厄米伴随矩阵T~+对椭圆器件在Jones表象本征矩阵的作用,得到椭圆器件的Jones矩阵及其关系。其次,用SU(2)与0(3)群的同态关系,得出椭圆器件在Stokes表象的Stokes-Mueller矩阵。圆器件与线性器件的Stokes-Mueller矩阵皆为其特殊情形。