共现分析在知识服务中的应用研究

在论证共现分析内涵、方法论和流程的基础上，探索研究共现分析在知识服务方面的应用，具体阐述共现分析在构建概念空间和Ontology实现语义检索、改进知识组织中文本分类效果、分析文献中知识内容关联、挖掘知识价值的应用。     

微信视域下高校知识产权信息服务的现状与发展对策研究

[目的/意义]为切实了解当前高校知识产权信息服务现状,以微信服务为切入点,对高校知识产权信息服务实践进行分析与总结,以期为高校图书馆知识产权信息服务创新提供思路.[方法/过程]对已自主成立知识产权信息服务中心的86家高校图书馆的官方订阅号进行调研,统计分析知识产权信息服务类文章的情况.从文章的发布时间、署名、服务栏目、...     

高职商务英语专业发展及其实践教学模式研究

由于对实践教学及其体系构建等方面缺乏研究,我国高职院校商务英语专业在快速发展的同时,正在遭遇毕业生实践能力不强、就业途径不畅等棘手问题。构建商务英语专业"开放式"实践教学模式对培养学生的技能和能力非常有效,它通过三级实训,从单项到综合、从简单到复杂、从校内到校外,梯次进行,循序渐进,达到了学校培养与用人单位的岗位需求无缝对接的效果,从而缩短学生在校学习和工作岗位之间的距离。     

混凝土随机骨料分布模型研究

混凝土是由粗骨料、水泥砂浆及界面粘结带组成的复合材料。依据富勒抛物线和蒙特卡罗方法生成混凝土随机骨料分布模型,进而对复杂的力学行为进行计算机的模拟,该模型为混凝土结构的模拟分析和计算提供平台。     

用OCTAVE方法分析电子政务系统的信息安全

利用OCTAVE方法的基本原理,从资产保护的角度出发,分析了当前我国电子政务系统所面临的主要威胁以及信息安全保护的主要目标。以此为基础,讨论了我国相应的电子政务信息安全的应对策略,并认为建立一套基于资产的信息安全分析方法是很有意义的。     

篮球教学中检查与纠正错误方法探讨

本文主要就篮球教学中检查、纠正错误的动作加以分析、研究。     

Direct observation of nodeless superconductivity and phonon modes in electron-doped copper oxide Sr1−xNdxCuO2

The microscopic understanding of high-temperature superconductivity in cuprates has been hindered by the apparent complexity of crystal structures in these materials. We used scanning tunneling microscopy and spectroscopy to study the electron-doped copper oxide compound Sr_1−xNd_xCuO₂, which has only bare cations separating the CuO₂ planes and thus the simplest infinite-layer structure of all cuprate superconductors. Tunneling conductance spectra of the major CuO₂ planes in the superconducting state revealed direct evidence for a nodeless pairing gap, regardless of variation of its magnitude with the local doping of trivalent neodymium. Furthermore, three distinct bosonic modes are observed as multiple peak-dip-hump features outside the superconducting gaps and their respective energies depend little on the spatially varying gaps. As well as the bosonic modes, with energies identical to those of the external, bending and stretching phonons of copper oxides, our findings reveal the origin of the bosonic modes in lattice vibrations rather than spin excitations.     

New types of topological superconductors under local magnetic symmetries

We classify gapped topological superconducting (TSC) phases of one-dimensional quantum wires with local magnetic symmetries, in which the time-reversal symmetry is broken, but its combinations with certain crystalline symmetries, such as , , and , are preserved. Our results demonstrate that an equivalent BDI class TSC can be realized in the or superconducting wire, which is characterized by a chiral Z^c invariant. More interestingly, we also find two types of totally new TSC phases in the and superinducting wires, which are beyond the known AZ class, and are characterized by a helical Z^h invariant and Z^h⊕Z^c invariants, respectively. In the Z^h TSC phase, Z pairs of Majorana zero modes (MZMs) are protected at each end. In the case, the MZMs can be either chiral or helical, and even helical-chiral coexisting. The minimal models preserving or symmetry are presented to illustrate their novel TSC properties and MZMs.     

我国科技情报行业现状与发展对策分析

在调研和专家座谈的基础上,重点从业务构成、行业形势入手,对我国科技情报行业的现状进行了比较全面的回顾和分析.运用竞争情报中的SWOT方法,力求深入地对科技情报行业自身优势和劣势、外部机会和挑战进行了剖析,对可能的发展对策进行了初步分析.     

智能检索系统中用户兴趣模型构建技术研究

阐述了智能检索系统中基于贝叶斯推理网络的用户访问兴趣模型的构建过程以及其所依赖的技术原理;描述了在实现智能检索系统目的下引入用户兴趣学习层的知识库组织结构以及检索模型的匹配问题;介绍了模型中基于本体论的知识组织方式以及引入贝叶斯网络来动态调整用户兴趣概念权重并建立用户兴趣模型的技术。