网上文献获取存在的问题与对策

分析了读者获取网上文献信息存在的问题,从获取文献线索的途径、现代化参考咨询服务、原文获取的途径等方面论述了提高读者文献获取与利用能力的对策。     

基于文本的电子地图形式化表达研究

地理空间的表达是地理数据组织、存储、运算、分析的基础。通过电子地图数据纽织的分析，以BNF为理论基础，提出了一套简洁、易于实现的电子地图描述性规则，可以方便地利用文本编辑器编辑，实现了电子地图在不同软件系统中通用性的目的，极大地提高了工作效率。     

中心二次曲线的一个轨迹特征

证明了平面曲线c是中心二次曲线的充要条件为:c是到两定点连线的斜率之积为一非零常数的点的轨迹,并就此常数的变化与轨迹类型和图形形状的关系进行了讨论.     

Provably Secure Information Hiding via Short Text in Social Networking Tools

Utilizing OnLine Short Text (OLST) in social networking tools such as microblogs, instant messaging platforms, and short message service via smart phones has become a routine in daily life. OLST is appealing for personal covert communication because it can hide information in a very short carrier text, and this concealment is hard to detect due to the diversity of normal traffic. However, designing appropriate schemes confronts several challenges: they need to be provably secure, and their performance needs to maintain high efficiency and handy usability due to the short length of OLST messages. In this paper, we propose a family of customized schemes known as HiMix, HiCod, HiOpt, and HiPhs for text steganography in OLST. These schemes are evaluated in terms of their security and their performance with regard to two metrics that address the particular characteristics of OLST: hiding rate and hiding ease. All proposed schemes are proved to be at least computationally secure, and their performance in terms of hiding rate and hiding ease justifies their applicability in social networking tools that utilize OLST.     

The Interaction Betweena Reader and a Text in Reading Process —— the Application of Schemata Theory in Reading Two Poems

Ｆｏｒｃｅｎｔｕｒｉｅｓ，ｔｈｅｒｅｈａｓｂｅｅｎａｎｅｖｅｒｉｎｃｒｅａｓｉｎｇｉｎｔｅｒｅｓｔｉｎｔｈｅｎａｔｕｒｅｏｆｒｅａｄｉｎｇｐｒｏｃｅｓｓ，ａｎｄｍａｎｙｏｆｔｈｅｓｅａｔｔｅｍｐｔｓｔｏｄｅｓｃｒｉｂｅｔｈｅｐｒｏｃｅｓｓｈａｖｅｂｅｅｎｉｎｃｏｎｆｌｉｃｔｗｉｔｈｅａｃｈｏｔｈｅｒ，ｗｈｉｃｈｍａｋｅｓｕｓｒｅａｄｅｒｓｃｏｎ ｆｕｓｅｄｉｎｕｎｄｅｒｓｔａｎｄｉｎｇａｎｄａｐｐｒｅｃｉａｔｉｎｇａｔｅｘｔ，ｅｓｐｅ ｃｉａｌｌｙａｌｉｔｅｒａｒｙｏｎｅ．Ｔｒａｄｉｔｉｏｎａｌｌ…     

拉氏（Laguerre）双曲型有核圆汇的一个性质及其应用

本文得到了拉氏(Laguerre)双曲型有核圆汇的一个性质,即拉氏双曲型有核圆汇δ(Z-Z_0)=-k(k>0)可以看成由抛物型线性圆列族lⅠ(α,β)和lⅡ(α,β)所构成。构造出lⅠ(α,β)和lⅡ(α,β)的矩阵方程,并用代数法和作图法解决了如何寻求一个双曲型有核圆汇和两个抛物型有核圆汇的公共圆问题。     

工业用电容式两相流相浓度传感器

为解决工业管道内气固两相流体的离散相浓度的在线测量问题，研制了一种非接触式电容传感器。通过计算机辅助设计优化电容传感器测量探头的结构，配置高频抗杂散电容的信号检测转换电路，已制成原理样机。静态实验和初步动态实验表明，此传感器性能稳定，满足工业应用要求。     

CsCrCl_3晶体的光谱研究

本文基于弱场图象，利用Ｒａｃａｈ不可约张量算符法，建立了ｄ４（Ｃ＇３ｖ）离子含旋轨耦合作用的完全能量矩阵。借助此矩阵，利用完全能量矩阵的对角化方法，对ＣｓＣｒＣｌ３晶体的光谱进行了理论计算，其结果同实验结果很吻合。同时，本文从理论上证明了２３２２８ｃｍ（－１）、２３３１０ｃｍ（－１）这两条强谱线产生于双中心跃迁。     

高粘流体流动沸腾传热实验及流型

在垂直管内用高粘假塑性流体进行了流动沸腾传热实验,观察到一种新的流型,建立了流动沸腾传热给热系数关联式.