后现代认识论转向下的高职智慧图书馆服务模式建构与实践探究     

许正兴 《新世纪图书馆》2020,(3):45-48,56

基于后现代认识论与智慧图书馆的同一知识基础和"智慧"主题论证其价值指向,本文在梳理概括两者关系以阐明其机理特征的基础上,以后现代涉身性、情境性、生成性等知识观分析了高职智慧图书馆技术资源、空间场所、人文组织等相关建设,藉此系统建构了高职智慧图书馆服务模式和综合进路,为高职智慧图书馆转型提供理论指引和实践支持。  相似文献   

《离散数学》课程教学中应注意的几个问题     

严谦泰  李波 《教育理论与实践》2012,(12):49-51

在《离散数学》课程教学中,应让学生充分了解《离散数学》课程的内容,培养学生学习的兴趣;解决好"多"与"少"的关系;处理好"深"与"浅"的关系;注重"学"与"用"的关系。解决好教学中的这些问题,有利于提高《离散数学》课程的教学质量,有利于培养与提高学生的综合能力。  相似文献   

“离散数学”教学方法的研究与探索     

方富贵 《河西学院学报》2012,(5):116-118

"离散数学"是计算机科学与技术的重要基础课,本文从教学内容、教学方法、教学手段以及考核方式四个方面对离散数学的教学方式进行了一系列的探讨工作,其目的是提高离散数学的课堂教学效果,激发学生的学习兴趣,培养学生的创新能力.  相似文献   

Surface settlement caused by twin-parallel shield tunnelling in sandy cobble strata     

Chuan He  Kun Feng  Yong Fang  Ying-chao Jiang 《浙江大学学报(A卷英文版)》2012,13(11):858-869

City metro tunnels are usually constructed as twin-parallel tunnels and their adjacent construction may lead to surface deformation, affecting the surface environment and the safety of the tunnels. Due to its strong dispersion, sandy cobble strata can be easily disturbed by shield tunneling. Based on the project of the Chengdu Metro Line 1, field and model tests were carried out to study the surface settlement caused by shield tunneling in sandy cobble strata by measuring surface settlement curves, ground loss ratios and construction influence zones. The discrete element method (DEM) was used to study the factors affecting the formation of ground arches in sandy cobble strata at the microscopic level. Results show that the shape of the surface settlement curve in sandy cobble strata is different from that in soft soil. The buried depth and clear spacing of the two tunnels had a significant impact on the formation of ground arches.  相似文献   

基于离散Hopfield神经网络的数字识别研究     

王小峰 《忻州师范学院学报》2012,28(2):21-24

离散Hopfield神经网络具有联想记忆的功能,利用这一功能对数字进行识别可以取得令人满意的效果,并且其计算的收敛速度很快。通过创建Hopfield网络,将带噪声的数字点阵输入到其中,利用MATLAB神经网络工具箱中的函数进行仿真测试,并对测试的结果进行分析、比较,实验结果表明Hopfield神经网络用于数字识别是可行、有效的。  相似文献   

基于RSA和DLP数字签名方案的分析和改进     

汤鹏志  何涛  李彪  徐雷 《宜春学院学报》2012,34(8):1-3

以李发根提出的签名方案为例子,通过攻击发现了它的安全性存在漏洞,并针对它的安全漏洞提出了一种改进的签名方案。该方案同样是基于RSA和DLP两大困难问题,同时修复了李的方案中存在的漏洞,并且步骤简单并且安全性可靠。通过4种方式的攻击对改进的方案进行安全性分析,证明了改进的方案在RSA和DLP问题不能同时求解的情况想是安全的。同时改进的方案计算步骤和复杂度上都优于Li的方案,信息通信量上低于Li的方案。  相似文献   

Cognitive multi-modal consistent hashing with flexible semantic transformation     

《Information processing & management》2022,59(1):102743

Multi-modal hashing can encode the large-scale social geo-media multimedia data from multiple sources into a common discrete hash space, in which the heterogeneous correlations from multiple modalities could be well explored and preserved into the objective semantic-consistent hash codes. The current researches on multi-modal hashing mainly focus on performing common data reconstruction, but they fail to effectively distill the intrinsic and consensus structures of multi-modal data and fully exploit the inherent semantic knowledge to capture semantic-consistent information across multiple modalities, leading to unsatisfactory retrieval performance. To facilitate this problem and develop an efficient multi-modal geographical retrieval method, in this article, we propose a discriminative multi-modal hashing framework named Cognitive Multi-modal Consistent Hashing (CMCH), which can progressively pursue the structure consensus over heterogeneous multi-modal data and simultaneously explore the informative transformed semantics. Specifically, we construct a parameter-free collaborative multi-modal fusion module to incorporate and excavate the underlying common components from multi-source data. Particularly, our formulation seeks for a joint multi-modal compatibility among multiple modalities under a self-adaptive weighting manner, which can take full advantages of their complementary properties. Moreover, a cognitive self-paced learning policy is further leveraged to conduct progressive feature aggregation, which can coalesce multi-modal data onto the established common latent space in a curriculum learning mode. Furthermore, deep semantic transform learning is elaborated to generate flexible semantics for interactively guiding collaborative hash codes learning. An efficient discrete learning algorithm is devised to address the resulting optimization problem, which obtains stable solutions when dealing with large-scale multi-modal retrieval tasks. Sufficient experiments performed on four large-scale multi-modal datasets demonstrate the encouraging performance of the proposed CMCH method in comparison with the state-of-the-arts over multi-modal information retrieval and computational efficiency. The source codes of this work could be available at https://github.com/JunfengAn1998a/CMCH .  相似文献   

一类含离散时滞的细胞动力学模型的渐近性     

黄土森 《宁波大学学报(教育科学版)》1989,(2)

本文在Martin Eisen的二房室增长模型中引入离散时滞,利用离散时滞稳定性理论,证明了平衡点的渐近稳定性。  相似文献   

利用洛伦兹变换创建双标度时空坐标的设想     

王家兴  冯敏全  付鹏 《通化师范学院学报》2006,27(6):51-54

洛伦兹变换是建立在光速不变原理和狭义相对性原理两个假设的基础上,并引用了伽利略变换原理而得出的结论.因为光速和两惯性系的相对运动速度都是常数,所以,洛伦兹变换实质上就是在两个惯性系间进行的时间和空间的坐标变换.因为相对性原理的意义在于自然现象或物理形式对任何惯  相似文献   

What students want: using a choice modelling approach to estimate student demand     

Paula Sheppard  Richard Smith 《Journal of Higher Education Policy & Management》2016,38(2):140-149

  相似文献