浅析迟子建散文中的联想

迟子建散文通过丰富的想象力将祖国北方的大自然美景以及内心丰富的情感细腻的向读者呈现。她通过丰富的想象力传神地表达了朴素的生活,儿时神话的熏陶也为她的散文增添了不少艺术的魅力。独特的艺术联想,巧妙地构思,营造了一种诗意的氛围,描绘出一个令读者神往的艺术世界。     

尖端创新神经技术脑研究计划:美国脑研究计划评介

正作为神经科学研究超级大国的美国,正拟启动尖端创新神经技术脑研究计划。该计划此前称作脑活动图计划,已经过一年多的筹备性论证。计划的主要目标是,通过包括纳米技术在内的一系列技术创新,全面构造神经活动图谱,以求在神经-精神疾病诊治及智能机开发上取得突破。围绕计划目标之可行性存在大量争鸣。     

周期可调谐金属光栅的制备工艺研究

介绍了一种制备金属可调谐光栅的新技术。首先采用紫外光刻技术将光栅结构制作至PDMS（聚二甲基硅氧烷）基底，并在其上蒸镀金属Cr层和Ag层，然后采取金属举离工艺得到金属光栅。利用PDMS高弹性的特点，通过控制PDMS纵、横向拉伸程度，对金属光栅周期进行连续、任意调谐，获得预定的目标周期。实验结果表明，金属光栅调谐范围超过其初始周期的100%。     

胡子鲶（Claris fuscus Lacepede）雄性泌尿系统组织学的观察研究

对胡子鲶（Claris fuscus Lacepede)泌尿系统，即肾脏、输尿管、膀胱以及尿道的组织学特征进行了初步观察和研究。结果表明，胡子鲶泌尿系统组织学特征与鲤科（Cyprinider）鱼类泌尿系统组织学特征大致相同，但也有一定区别。为今后鲶亚目（Siluroidei)鱼类的研究和养殖，提供一定的参考资料。     

Dissolved organic nitrogen (DON) in the processes of polluted source water treatment

Dissolved organic nitrogen (DON) is currently considered to be one of the most important issues in drinking water field due to its formation of nitrogenous disinfection byproducts. This paper deals with DON concentrations in typical processes of a water treatment plant. The results show that very little DON is removed by these processes. Furthermore, biological activity in some processes can even increase DON concentration and decrease the ratio of dissolved organic carbon/DON, which may pose a risk to drinking water safety.     

A security patch for a three-party key exchange protocol

The CLC protocol (proposed by Tzung-Her Chen, Wei-Bin Lee and Hsing-Bai Chen, CLC, for short) is a new three-party password-authenticated key exchange (3PAKE) protocol. This CLC protocol provides a superior round efficiency (only three rounds), and its resources required for computation are relatively few. However, we find that the leakage of values A _V and B _V in the CLC protocol will make a man-in-the-middle attack feasible in practice, where A _V and B _V are the authentication information chosen by the server for the participants A and B. In this paper, we describe our attack on the CLC protocol and further present a modified 3PAKE protocol, which is essentially an improved CLC protocol. Our protocol can resist attacks available, including man-in-the-middle attack we mount on the initial CLC protocol. Meanwhile, we allow that the participants choose their own passwords by themselves, thus avoiding the danger that the server is controlled in the initialization phase. Also, the computational cost of our protocol is lower than that of the CLC protocol.     

一种新的结构简单的大口径全息平面干涉仪

本文提出了一种结构十分简单的大口径全息平面干涉仪,理论与实验证明利用全息图的位相误差补偿作用制成大口径的全息平面干涉仪是完全可行的。     

烷氧基钛水解制备TiO_2超细粒子 Ⅱ.水解反应动力学及粒子形成

测定了烷氧基钛水解成核的诱导时间,研究了水解反应形成TiO_2超细粒子的机理,及溶剂和反应底物对水解反应机理的影响规律。导出了丁氧基钛在醇溶剂中的水解反应速率方程与对应的水解和聚结反应历程该机理同实验结果相吻合。     

三种类型樟树果实的精油

本文报道樟树果实精油的化学成分,应用气相色谱、气相色谱-质谱联用仪、柱层析、核磁共振等方法,鉴定了樟树三个生化类型(本樟、油樟、芳樟)的果实在三个不同生长时期精油的化学成分及其变化规律.本樟果实精油主含樟脑和黄樟油素;油樟果实精油主含甲基丁香酚和桉叶油素;芳樟果实精油主含甲基丁香酚和黄樟油素.随着果实生长时期的不同,樟树果实精油的主要成分含量也随之发生变化.