聚乙二醇4000相转移催化合成N,N-二乙基苯胺

用聚乙二醇4000作相转移催化剂，在常压下由苯胺和溴乙烷合成N，N-二乙基苯胺，研究了多种反应因素对目的产物产率的影响，提出了常压催化合成目的产物的最佳工艺条件是：苯胺和溴乙烷的摩尔比为1：1.5，催化剂用量0．20g，在25mL40％（质量分数）的氢氧化钠溶液中，反应温度55℃，常压反应6h，产品收率89．3％。     

DDoS攻击防御机制综述

DDoS攻击是目前威胁网络安全的主要因素之一。本文分类介绍了现有的DDoS攻击防御机制,阐明了各种机制之间的关系,给出了每种防御机制的应用实例,全面分析了各种防御机制的优缺点。对正确认识DDoS攻击及其防御有很大的参考价值。     

基于XML描述的EDI三层技术体系设计与构建

利用XML强有力的语法描述特性探讨设计并优化现有的EDI体系，提出一套完整齐全且高效灵活的商业EDI解决方案。方案已经实现，实践证明在许多方面，尤其是在EDI报文的交互性方面，与传统的EDI体系或具备简单XML特性的EDI体系来说，具有很强的优越性。     

一种高断裂韧性铝锂合金的断裂特征

发现了铝锂合金的一种罕见的断裂韧性加载曲线及相应的“楼梯状”断裂断口。具有这种“楼梯状”断口的合金其断裂韧性值很高，本文用裂纹桥理论及裂纹偏转与阻力曲线的关系对楼梯状断口的形成进行了研究及解释。     

色度传感器非线性误差校正的神经网络模型

介绍了色度传感器的结构和特点及其非线性误差问题，提出了一种基于人工神经网络的非线性滤波器黑箱模型，并成功地应用于色度传感器光谱三刺激值非线性误差的校正中。     

国企职工管理机制的探讨

对现阶段国企职工的管理，不能简单地使用制度和奖金来控制职工的工作行为，而是要打破传统观念，大胆创新，充分发挥全体职工的智慧，全面调动企业职工的自觉性和主动性，以达到促进企业良性发展的目的。结合安阳钢铁股份公司的管理实际，对现阶段国有企业职工管理机制进行了探讨。     

穿孔机导盘润滑技术研究

13Cr钢管在穿孔时的润滑技术和冷却技术与传统轧制工艺有所不同 ,对此问题进行研究 ,使其满足轧制 1 3Cr钢钢管的新工艺要求 ,最终达到轧制高质量 1 3Cr钢钢管的目的     

Simulation of dimer diffusion on metal fcc (001)surfaces by molecular dynamics

We study systematically the dimer diffusion on metal fcc (001) surfaces through molecular dynamics calculations based on embedded atom method. Besides the conventional hopping and exchange mechanisms, some other interesting diffusion mechanisms are observed, such as the exchange rotation mechanism, the cooperative hopping mechanism, and the cooperative exchange mechanism. On the different kinds of metal surfaces, we find that not only the dominant diffusion mechanism but also the physical model for the exchange mechanism is different.     

光纤、电容液滴分析仪(二):系统设计

详细介绍了光纤、电容液滴分析仪(FCDA：Fiber—Capacitive Drop Analyzer)的系统设计方案和各组成部分的具体实现方法，包括液滴传感器的设计、微量供液系统的设计、信号处理电路的设计和仪器研究平台的开发。     

Efficient video copy detection using multi-modality and dynamic path search

Efficient and robust video copy detection is an important topic for many applications, such as commercial monitoring and social media retrieval. In this paper, with the aim of handling large-scale video data, we propose an efficient and robust video copy detection method jointly utilizing the characteristics of temporal continuity and multi-modality of video. The video is converted to a continuous sequence of states, and both the visual and auditory features are extracted for temporal frames. To facilitate tolerance of the length variations caused during video re-targeting, an efficient dynamic path search method is proposed to detect the target video clips, and highly compact audio fingerprint and visual ordinal features are jointly utilized in a flexible frame. The proposed scheme not only achieves high computational efficiency but also guarantees effectiveness in real applications. Comparison experiments were conducted using video commercials and real television programs from four channels as well as a benchmark video copy detection dataset, and the results demonstrate both the high efficiency and high robustness of the proposed method.