基于抗差估计的灰色模型与时间序列组合模型及其在变形预测中的应用

文章讨论的方法是在时序分析建模的基础上,运用了GM(1,1)来提取趋势项,然后对残差进行时序建模,形成灰色与时序的组合模型,在建模中的参数估计方法,采用抗差估计来取代常规的最小二乘估计法,来达到抵抗粗差的目的,从实例计算来看,效果比较好。     

Low Friction Carbide-Derived Carbon Coating on SiC in Vacuum Achieved by Microstructure Formulation and Solid–Liquid Lubrication

Carbide-derived carbon (CDC) coatings with dimple (CDC@GSiC coating) and loosely dispersive particles structures (CDC@RBSiC coating) were prepared on two kinds of SiC substrates by using chlorination at 1,000 °C in a 5 vol.% Cl₂–Ar gas. Microstructural effect makes the two CDC coatings exhibit different frictional behavior in ambient pressure and in vacuum. For the CDC@RBSiC coating, the friction coefficient was from 0.08 to 0.12 at ambient pressure and is sensitive to evacuation from ambient pressure to 10³ Pa while it was as high as 0.42 up to a pressure of 10^?4 Pa. Progressive evacuation does not vary the friction coefficient of the CDC@GSiC coating up to 10^?3 Pa. The wear of the CDC@GSiC coating was low with a maximum depth of 8 μm and much lower than that of the CDC@RBSiC coating (70 μm). The dimples on the surface and pores in the CDC@GSiC coating are reservoirs for ion liquid (IL), and the IL impregnated CDC@GSiC coating shows very low friction and wear at ambient pressure and in vacuum.     

"楔形"TEM样品的机械研磨制备技术

介绍了一种用机械研磨法制备集成电路TEM楔形样品的技术,讨论了该制样技术所需注意的关键点,并给出了判断样品薄区是否满足TEM分析要求的两种方法。楔形样品减薄技术兼具制样速度快和样品质量好的优点。该技术既可用于制备非定点TEM样品,也可用于制备定点的TEM样品。给出了用该技术制备的定点失效的MOS器件TEM照片。熟练的技术人员可以用此方法在半小时内完成一个样品的制备。     

Polarity assignment in ZnTe, GaAs, ZnO, and GaN-AlN nanowires from direct dumbbell analysis

Aberration corrected scanning transmission electron microscopy (STEM) with high angle annular dark field (HAADF) imaging and the newly developed annular bright field (ABF) imaging are used to define a new guideline for the polarity determination of semiconductor nanowires (NWs) from binary compounds in two extreme cases: (i) when the dumbbell is formed with atoms of similar mass (GaAs) and (ii) in the case where one of the atoms is extremely light (N or O: ZnO and GaN/AlN). The theoretical fundaments of these procedures allow us to overcome the main challenge in the identification of dumbbell polarity. It resides in the separation and identification of the constituent atoms in the dumbbells. The proposed experimental via opens new routes for the fine characterization of nanostructures, e.g., in electronic and optoelectronic fields, where the polarity is crucial for the understanding of their physical properties (optical and electronic) as well as their growth mechanisms.     

Local electrical potential detection of DNA by nanowire-nanopore sensors

Nanopores could potentially be used to perform single-molecule DNA sequencing at low cost and with high throughput. Although single base resolution and differentiation have been demonstrated with nanopores using ionic current measurements, direct sequencing has not been achieved because of the difficulties in recording very small (～pA) ionic currents at a bandwidth consistent with fast translocation speeds. Here, we show that solid-state nanopores can be combined with silicon nanowire field-effect transistors to create sensors in which detection is localized and self-aligned at the nanopore. Well-defined field-effect transistor signals associated with DNA translocation are recorded when an ionic strength gradient is imposed across the nanopores. Measurements and modelling show that field-effect transistor signals are generated by highly localized changes in the electrical potential during DNA translocation, and that nanowire-nanopore sensors could enable large-scale integration with a high intrinsic bandwidth.     

从格式塔看电影建筑空间

试利用在格式塔心理学的原理,从其几个重要的属性出发,对电影建筑空间的审美进行分析,通过其实例和理论依据在心理学层次上的研究分析和比较．达到从视知觉的角度上探索其审美实质的目的。     

公理设计与创新问题解决理论及其比较研究

对公理设计和创新问题解决理论进行了简单介绍，并对二者相关的部分进行了比较，说明二者具有可结合性，将两者有机融合起来进行产品设计将使得设计过程更简单，设计结果更具有创新性，最后通过举例说明了两者结合设计产品的过程．     

A facile approach in fabricating superhydrophobic and superoleophilic poly (vinylidene fluoride) membranes for efficient water–oil separation

New preparation strategies for films that exhibit separation of emulsified oil/water mixtures through a simple, practical, and cost‐effective method are highly desirable. Herein a poly (vinylidene fluoride) membrane with superhydrophobic and superoleophilic surface had been successfully fabricated via a facile dip‐coating process. As‐prepared membrane exhibits good stability of wettability and can be applied for oil and water mixture separation. After cycles, the membranes still keep a relatively high flux, which indicates their great potential for practical applications. © 2015 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2015 , 132, 42077.