二阶A型Cooper变换的增强型

对二阶Ａ型Ｃｏｏｐｅｒ变换进行增强，放宽可用性条件，并证明了其正确性，最后举例说明其应用。     

纸张背衬不同衬底时的光反射率的研究

从理论上研究了纸张背衬不同衬底的光反射率，得出下列表达式：Ｒｂ＝Ｒｏ＋（Ｒ∞－Ｒｏ）×（１／Ｒ∞－Ｒｏ）／（１／Ｂ－Ｒｏ）（Ｂ为衬底的光反射率），该式简单实用且物理意义明确。利用上述公式，可将Ｔａｐｐｉ标准列出的Ｔａｐｐｉ不透明度Ｃ０．８９的换算公式简化，并可从理论上定性地讨论纸张不透明度与印刷透印性的关系。     

Voigt线型及其精确快速算法

通过把上半复平面分为４个区，并在每一区利用不同近似，建立了一种精确快速计算Ｖｏｉｇｔ函数、修正的Ｖｏｉｇｔ函数和Ｖｏｉｇｔ函数偏导数的算法，其最大相对误差小于５×１０－４．该算法是Ｌｉｎｅ－ｂｙ－Ｌｉｎｅ大气透过率／辐射强度计算及其相关应用的有效算法．     

米塔尔钢铁集团的全球并购发展战略

概述了米塔尔的并购经过和并购特点,着重探讨了米塔尔的管理模式、人员情况、钢铁厂布局、生产经营、主要战略伙伴、研发机构及其生产、采购与销售策略。系统地分析了米塔尔在中国的发展,指出米塔尔在全球钢铁业整合中处于领先地位,米塔尔来中国投资看中的是中国的原料和市场,且运作步伐明显加快,会对中国钢铁企业构成很大的威胁。     

Model-based automated extraction of microtubules from electron tomography volume.

We propose a model-based automated approach to extracting microtubules from noisy electron tomography volume. Our approach consists of volume enhancement, microtubule localization, and boundary segmentation to exploit the unique geometric and photometric properties of microtubules. The enhancement starts with an anisotropic invariant wavelet transform to enhance the microtubules globally, followed by a three-dimensional (3-D) tube-enhancing filter based on Weingarten matrix to further accentuate the tubular structures locally. The enhancement ends with a modified coherence-enhancing diffusion to complete the interruptions along the microtubules. The microtubules are then localized with a centerline extraction algorithm adapted for tubular objects. To perform segmentation, we novelly modify and extend active shape model method. We first use 3-D local surface enhancement to characterize the microtubule boundary and improve shape searching by relating the boundary strength with the weight matrix of the searching error. We then integrate the active shape model with Kalman filtering to utilize the longitudinal smoothness along the microtubules. The segmentation improved in this way is robust against missing boundaries and outliers that are often present in the tomography volume. Experimental results demonstrate that our automated method produces results close to those by manual process and uses only a fraction of the time of the latter.     

一个实用、高效网络攻防训练模拟系统的设计与实现

随着信息技术的发展,网络安全问题日益生要,它已经渗透到国家各个领域, 并在未来信息战中扮演不可替代的角色。网络攻防是信息战不可缺少的部分,为了提高安全管理人员的素质,需要构造一个融合安全理论、实践训练于一体的安全体系,因此我们提出了建立网络攻防训练模拟系统,主要由数据库子系统、网上理论学习及考试子系统、网络攻防仿真训练子系统,成果评估子系统组成。这四部分联动融合、形成体系, 构建了以数据库子系统为基础、交互式仿真训练子系统为框架的分市式、全方位、多层次的网上学习、训练、考核体系,可实现网络攻防训练、对抗、理论学习及考核评估等功能。     

ICA结构进化和未来网

ICA是一种含有中间件的网络软件体系结构,旨在以结构进化取得功能突破,据以全面支持来自用户的以及来自系统的各种应用需要。ICA的出台,表明国际上已建立起一种未来网定位新理念。ICA所代表的“信息通信”领域内的网络软件结构进化,立足于把未来网规范为三层结构,即“应用(Application)层”、“中间件(Middleware)层”和“基础(Baseware)层”。ICA的出现,对我国谋求新崛起是大好机遇,这不仅可以直接振兴我国网络软件产业,更可激励我国在新一轮的网络进化的进程中力争跻身“领潮国”的行列。“ICA融合了各种最新信息技术的长处”。ICA结构进化,标志着当今网络进化的时代特征。推进和实现基于ICA的未来网,有着较佳的可行性。     

实用宽带新技术

简要介绍了三种宽带新技术及其应用，包括替代五类线的VDSL，可解决HFC上行噪音漏斗效应的SCDMA技术以及利用电源线传输高速数据的PLC技术。这些新技术由于具有较高的性能价值比和广阔的应用前景，受到了广泛的关注。     

Formation of C4 species in the deactivation of a Pd/SiO2 catalyst during the selective hydrogenation of acetylene

The deactivation characteristics of Pd/SiO₂ in the selective hydrogenation of acetylene were correlated with changes in the amount of the C4 species produced. The amounts of butenes produced changed in parallel with the catalyst activity, indicating that the rate limiting step for butene production was the same as that for acetylene hydrogenation. On the other hand, the amount of 1,3-butadiene produced changed, showing a maximum with catalyst deactivation because 1,3-butadiene is an intermediate in the sequential reaction process which involves both the production and consumption of 1,3-butadiene. This was verified by a simultaneous TG/reaction experiment showing that 1,3-butadiene was a precursor of green oil. The catalyst showed a self-regenerative behavior in its activity and the amounts of C4 species produced during the early stage of deactivation because two opposite factors, which contributed to either the lowering or the promotion of activity, were involved in the process. A specific type of polymer species, produced during the initial period of deactivation, is proposed to be responsible for the promotion of catalyst activity.