跨国收购理论对于石油资源海外开发的启示

首先从理论上介绍跨国收购的重要意义．然后比较详细地阐述中国石油资源的现状，最后通过对现状的分析，提出石油资源海外开发的战略选择并且从地缘政治经济的角度比较详细地介绍国内三大石油巨头的海外收购行为。     

原地浸出采铀的数学模型

本文介绍原地浸出数学模型的基本条件、化学反应的处理方式，并以酸浸六价铀为例建立了较系统的数学方程。     

桥头跳车

车辆在桥台和引路路堤接合处的跳车增加了行车的危险性，并且造成每年超过一亿美元的养护费用。最新的研究提出了一些解决跳车问题的有效方法。     

城市景观中的缝与槽

缝与槽是线性艺术在城市景观中的表现方式,本文从线性艺术效果、虚实与光影、功能与建造三个方面进行研究与分析,使人们深入理解线性艺术在现代城市景观设计中的作用和效果。     

Hair can be a good biomarker of occupational exposure to mercury vapor: simulated experiments and field data analysis

Generally, urine mercury (U-Hg) is widely used for assessment of inorganic mercury (I-Hg) exposure in humans. The reliability of scalp hair as an indicator of mercury vapor exposure is contentious. However, significant correlations were found between hair total mercury (T-Hg) and U-Hg and between hair I-Hg and total gaseous mercury (TGM) in ambient air in our previous studies. Simulated experiments were designed to assess the contribution of direct absorption/adsorption of mercury vapor in the hair. Results indicated that the increases of hair T-Hg concentrations were less than 1 μg/g, which was negligible compared with hair T-Hg concentrations in occupationally exposed workers. The β-mercaptoethanol washing can remove 30% of mercury (Hg) in the exposed hair samples. The inhaled Hg constituted the major fraction (97.4%) of I-Hg exposure for the artisanal Hg mining workers. From the simulated experiments and field data analysis, we can conclude that hair I-Hg can be a useful tool for monitoring occupational exposure to Hg vapor.     

贵州省乳螱属一新种(等翅目:鼻螱科)

贵州乳螱Coptotermes(Polycriniterms)guizhoueusis,新种兵螱(图1—3) 头部深黄稍杂浅淡褐色,上颚赤褐色,上唇、触角和后颏以及胸、腹部和足为深黄色,或略浅于头色。头部仅散布少许长毛,上唇端部具一对长端毛,端毛周围可见数个极微小的毛。乳孔口两侧各具二枚毛,乳孔与触角窝之间各具一枚额侧毛。后颏前缘和     

在工程实践中对抗震加固设计的几点认识

提供多层砖混结构抗震加固设计实例材料,概括出抗震加固设计的方法.     

浅谈电梯的装饰性电器件的主题化装饰设计

每一种新产品几乎都是基于满足社会或用户的需求而诞生,所以有了现代工业设计中“形式追随功能”之说。但当产品的技术发展到一定程度,人们对产品的要求便不仅只停留在其功能（即实用性）上,而是会将实用性与美观性相结合,实现产品功能与形式的统一。     

核壳结构有机硅-丙烯酸酯乳液的合成

为制取防湿、耐水包装用纸的外层涂料,采用种子乳液聚合方法,合成了有机硅-丙烯酸酯乳液.研究了酸度、有机硅(D4)和交联剂用量对乳液聚合及涂膜性能的影响.并确定了最佳聚合条件,得到了吸水率低的优质涂膜.通过透射电镜(TEM)和红外光谱等对硅丙乳液的性能进行了表征,结果表明硅丙乳胶粒子具有稳定的核壳结构.     

Preparation and characterization of porous PDMS beads for oil and organic solvent sorption

In this article, poly (dimethyl siloxane) (PDMS) porous beads were prepared by suspension polymerization method using n‐octane and carbon tetrachloride (CCl₄) as diluents and pore formation agents. The apparent density, porosity and other characteristics were characterized. The absorption experiments showed that the porous PDMS beads exhibited more absorption capacity and faster absorption rate toward oils than the nonporous or oligoporous PDMS beads did, moreover they are of remarkable stability and recyclability, which could provide a path to absorb the oils floating on water. POLYM. ENG. SCI., 54:2965–2969, 2014. © 2014 Society of Plastics Engineers