塔北地区奥陶系碳酸盐岩缝洞充填方解石的阴极发光特征及对成岩环境的指示意义

对碳酸盐矿物和结构组分进行阴极发光分析可以直观、快捷地研究碳酸盐岩储层的成岩环境和成因。基于塔北地区奥陶系碳酸盐岩缝洞充填方解石阴极发光特征分析,结合Mn2+和Fe2+含量及流体包裹体均一温度,深入研究其对成岩环境的指示作用。结果表明:Mn2+和Fe2+含量及发光特征可大致反映成岩环境的氧化还原条件,明亮发光(Mn2+含量高)表明成岩环境为还原条件,也可能是与不发光胶结作用相关的氧化水停滞有关;昏暗—不发光表明成岩环境为氧化条件,是Mn2+趋向于被氧化为高价态而不易置换Ca2+进入晶格所致;不同产状的缝洞充填方解石发光性、Mn2+和Fe2+含量及两者比值各异,指示不同的成岩环境及充填期次,反映研究区缝洞形成及充填的复杂性和多期性。     

聚酰亚胺固体润滑涂层研究进展

综述了聚酰亚胺(PI)固体润滑涂层的摩擦学性能,分析了分子结构、填充改性、制备工艺等材料内部因素以及介质环境、温度、载荷和滑动速度、基底材料等外部因素对PI固体润滑涂层摩擦学性能的影响。     

A Self‐Assembled DNA Origami‐Gold Nanorod Complex for Cancer Theranostics

A self‐assembled DNA origami (DO)‐gold nanorod (GNR) complex, which is a dual‐functional nanotheranostics constructed by decorating GNRs onto the surface of DNA origami, is demonstrated. After 24 h incubation of two structured DO‐GNR complexes with human MCF7 breast cancer cells, significant enhancement of cell uptake is achieved compared to bare GNRs by two‐photon luminescence imaging. Particularly, the triangle shaped DO‐GNR complex exhibits optimal cellular accumulation. Compared to GNRs, improved photothermolysis against tumor cells is accomplished for the triangle DO‐GNR complex by two‐photon laser or NIR laser irradiation. Moreover, the DO‐GNR complex exhibits enhanced antitumor efficacy compared with bare GNRs in nude mice bearing breast tumor xenografts. The results demonstrate that the DO‐GNR complex can achieve optimal two‐photon cell imaging and photothermal effect, suggesting a promising candidate for cancer diagnosis and therapy both in vitro and in vivo.     

Effect of Li on Safety of Cu Components for EAST

Cu–Li–Cu multilayers were deposited on Si substrate by alternately using magnetron sputtering and resistance evaporation. Scanning Electron Microscope (SEM) and Rutherford Backscattering Spectrometry (RBS) were utilized to study the interaction and diffusion between Cu and Li after 8 h heat treatments at 100, 280, and 480 °C. The RBS results reveal that Li can diffuse into Cu when the temperature rises to 480 °C. As a supplementary experiment on Cu corrosion by Li at lower temperature, bulk Li and Cu were annealed at 240, 320 and 400 °C for 8 h separately in a high-temperature furnace after sealing in quartz ampoules. Morphology images show that Li corrodes grain boundaries of Cu preferentially when the temperature is higher than the melting point of Li, and the corrosion rates are 0.7875, 0.925 and 3.3275 mg/h, respectively. The results are helpful for understanding the Cu corrosion and protecting the Cu components in EAST.     

Predicting the Thermal Conductivity of AlSi/Polyester Abradable Coatings: Effects of the Numerical Method

The final target of this study is to achieve a better understanding of the behavior of thermally sprayed abradable seals such as AlSi/polyester composites. These coatings are used as seals between the static and the rotating parts in aero-engines. The machinability of the composite coatings during the friction of the blades depends on their mechanical and thermal effective properties. In order to predict these properties from micrographs, numerical studies were performed with different software packages such as OOF developed by NIST and TS2C developed at the UTBM. In 2008, differences were reported concerning predictions of effective thermal conductivities obtained with the two codes. In this article, a particular attention was paid to the mathematical formulation of the problem. In particular, results obtained with a finite difference method using a cell-centered approach or a nodal formulation allow explaining the discrepancies previously noticed. A comparison of the predictions of the computed effective thermal conductivities is thus proposed. This study is part of the NEWAC project, funded by the European Commission within the 6th RTD Framework programm (FP6).     

Manufacturing process modelling using process specification language

The manufacturing process is one of the important processes in a product??s life cycle. The sharing of manufacturing process information among different functional application systems, such as process planning, manufacturing simulation, manufacturing execution and project management, has become difficult to implement due to the growing complexity of the manufacturing information of product, process, resource and plant. A unified representation of manufacturing process information for all applications can enable convenient integration between different application systems. The development of manufacturing-related ontology and the Process Specification Language (PSL) has provided a formal definition and structure of semantic concepts for the capture and the exchange of manufacturing information. This paper presents a manufacturing process information modelling method which builds a standard, complete and exact definition of manufacturing process data by applying current PSL specifications. New extensions of the concepts of the manufacturing process and the types of relationship for describing activities, materials and resources in a process are identified and developed. The completeness and adaptability of activity relation of the proposed manufacturing process information representation is verified using mathematical induction under a variety of complex manufacturing process situations. The ability of the modelling method in expressing complex process information is demonstrated by a machining process example.     

液体粘性软启动控制精度影响因素的分析研究

针对液体粘性软启动试验重复精度差的问题,对影响控制精度的因素进行了分析,并提出了改进措施,改善了系统的控制精度。     

改进遗传算法求解柔性作业车间调度问题的研究

在考虑最大完工时间、总拖延时间、各个机器负荷平衡、所有机器上的总负荷等性能指标更加合理的情况下,设计一种新的选择算子,确保算法能快速收敛到全局最优解;利用提出的选择算子设计一种改进的遗传算法,提高求解效率.用基准实例测试改进的遗传算法,试验结果显示该算法能更有效地解决调度问题.