深水承台基础钢套箱施工

通过对西芹特大桥深水承台施工经验总结,为今后同类工程施工提供参考.     

桂红公路立交桥后张法预应力混凝土空心板梁施工技术

结合成都铁路枢组北编组站Ⅰ标段桂红公路立交桥施工实例，从施工工艺、模板安装、混凝土灌注、预应力施工等方面，介绍了公路空心板梁现场预制施工技术。     

建筑施工企业知识产权保护与管理工作的思考

针对建筑施工企业普遍存在的知识产权保护和管理工作发生的问题,提出科技管理中知识产权保护的对策和建议。     

Effects of Ce^3＋ on Chloroplast Senescence of Spinach under Light

The effects of Ce3 on the chloroplast senescence of spinach under light were studied. The results show that when the chloroplasts are illuminated for 1, 5 and 10 min with 500 μmol·cm-2·min-1 light intensity, the oxygen evolution rate is rapidly increased. When the chloroplasts are treated for 20, 30 and 40 min with 500 μmol·cm-2·min-1 light intensity, the oxygen evolution rate is gradually decreased. While spinach is treated with 16 μmol·L-1 Ce3 , the rate of oxygen evolution of chloroplasts in different illumination time (1,5, 10, 20, 30, 40 min) is higher than that of control, and when illumination time is over 10 min, the reduction of the oxygen evolution rate is lower than that of control. It suggests that Ce3 treatment can protect chloroplasts from aging for long time illumination. The mechanism research results indicate that Ce3 treatment can significantly decrease accumulation of active oxygen free radicals such as O2·- and H2O2, and reduce the level of malondialdehyde (MDA), and maintain stability of membrane structure of chloroplast under light. It is shown that the redox took place between cerium and free radicals, which are eliminated in a large number, leading to protect the membrane from peroxidating.     

基于文本化简的实体属性抽取方法

研究了非结构化中文文本的实体属性抽取方法。引入文本化简作为抽取的预处理过程,解决传统信息抽取方法因为长难句的存在和自然语言表述多样性导致抽取效果不佳的问题。其中,文本化简被建模为一个序列到序列（seq2seq）的翻译过程,并用机器翻译领域的seq2seq-RNN模型进行实现。为了提升模型的化简效果,进行了不同层面的优化,包括使用预训练词向量、收集常用词汇表、引入词性标注和设计化简评分函数,这些优化使模型专注于化简过程中句法转换的学习。针对化简后的文本,设计基于简洁规则的方法进行信息元组和实体属性抽取。实验表明,对seq2seq-RNN的改进能提升文本化简的效果,而且在化简文本上抽取的信息数量比在原始文本上的多,信息也比较精确。     

移动自组网中基于动态第三方的可信公平非抵赖协议

由于移动自组网Manet(Mobile Ad-hoc Networks)是一个无中心的网络且不存在值得信任的结点,传统的公平非抵赖协议因需要一个固定可信第三方TTP(Trusted Third Party)而不足以保证Manet的高效性和安全性.本文在可信平台模块TPM(Trusted Platform Module)的安全体系结构基础上提出了一种Manet中基于动态第三方的可信公平非抵赖协议,以取代固定TTP,提高协议效率,并运用TPM完整性度量技术和DAA(Direct Anonymous Attestation)远程认证技术,保证证据可信.最后利用Event B对该协议进行形式化建模,证明其有效性和公平性.