加强资源综合利用 促进有色冶金节能

本文简要介绍了国发(1996)第36号文“关于进一步开展资源综合利用意见的通知”的主要内容和广义节能的基本原理,说明有色金属工业共生金属开发,废渣、余热利用方面大有可为,具有重大的广义节能意义,并针对现存问题,提出若干改进建议。     

数据仓库元数据的界定与分类

元数据是数据仓库研究的热点,目前对元数据有多种定义方式,如：描述数据的数据 ,数据和信息之间的桥梁等,这些面向应用角度的定义,并不能真正表达元数据的内涵．本 文从元数据和基础数据分离过程入手,研究元数据的定义和分类,对元数据的概念内涵进行 深入探讨,提出广义元数据和狭义元数据的概念,扩展元数据的定义,克服面向应用角度定 义元数据的不足．     

Selecting and conserving lands for biodiversity: The role of remote sensing

A major focus of conservation is on protecting areas to ensure the persistence of biological diversity. Because such areas may be large, not easily accessible, subject to change, and sensitive to the surrounding landscape, remote sensing can be a valuable tool in establishing and managing protected areas. We describe three case studies to illustrate how remote sensing can contribute to setting priorities for conservation actions, monitoring the status of conservation targets, and evaluating the effectiveness of conservation strategies. In the Connecticut River watershed, remote sensing has been used to assess flood regimes and identify key areas of floodplain forests and their context for conservation planning. At Eglin Air Force Base in Florida, remote sensing has provided information to assess the effectiveness of management strategies to restore fire to the longleaf pine sandhills ecosystem, control invasive species, and prioritize annual prescribed burns. In eastern US forests, remote sensing is being used to evaluate the ecological condition and changes at properties where direct access would be difficult.As the resolution and capacities of remote-sensing technology continue to develop, however, several issues are becoming increasingly important. It is essential that the spatial and temporal resolution of remote-sensing data be matched to the relevant scales of biodiversity, major threats, and management actions. Data layers must be compatible, both in scale and in measurement properties, and key patterns must be distinguished from irrelevant detail, especially at the finer scales of application in local management. Combining remote sensing with ground surveys can expand the array of information used in management and contribute to the ecological interpretation of remote-sensing data. Because conservation funds are always limited, remote sensing also must be cost effective. This requires balancing the wealth of detail afforded by ever-finer resolution of remote-sensing data with what is actually needed to implement sound conservation and management. Remote sensing is a valuable tool, but it is not a panacea for all of the challenges of conservation monitoring and management.     

基于意群划分的中文微博情感倾向分析研究

微博作为一种新兴的社交网络平台,逐渐成为公众发布个人信息,获取实时信息,表达个人观点的新平台。针对微博情感倾向判断的问题,提出了一种基于意群划分的中文微博情感倾向分析(STDSG)方法。引入意群的概念,提出微博意群划分算法,根据意群间的关系,考虑否定词、程度词及标点符号的对情感倾向分析的影响,提出计算微博意群情感倾向的方法。在给定的数据集上,实验结果准确率达到了80.1%,总体性能优于基于情感词典的方法及基于支持向量机的方法。     

现代图学教学中的图感因素探析

为探索工程图学的有效教学方法,论文从心理学的角度在对图感因素进行深层分析和认知的基础上,研究丰富了图感的概念及其本质特性;结合教学工作实际探索了图感培养的方法,以期创造更加符合认知规律的教学模式,更好地提高学生的图学文化水平和图学思维能力。     

基于改进的Bayes判别法的中文多义词消歧

介绍了词义消歧研究的进展。对基于Bayes判别法的词义消歧算法做了改进,加大与多义词存在句法依存关系的特征词在Bayes判别公式中的权值比重,较好改善词义消歧的效果,并设计对比实验,验证了改进算法的优越性,分析了语料规模、数据噪声、数据稀疏问题对词义消歧的影响的规律。     

基于OpenGL的实体真实感图形显示工具的开发

基于对图形开发库OpenGL和STL文件格式的研究,提出了使用STL数据实现实体真实感圊形显示的思路,并且给出了利用OpenGL显示STL文件实体的编程步骤,依此开发了三维图形显示工具,该显示工具操作简便,显示效果良好。     

浅谈毕加索拼贴画风格对现代招贴设计的影响

毕加索创造了拼贴画风格,这种风格的影响一直延续到了现在,现代的招贴设计也大量地使用了毕加索的拼贴画风格。其中日本平面大师原研哉是最有名的设计师之一,其作品代表了未来招贴设计的一种发展趋势。本文就是想通过研究毕加索的拼贴画风格来对未来的招贴设计提出一些启示。     

Detection of aircraft below the horizon for vision‐based detect and avoid in unmanned aircraft systems

Vision‐based aircraft detection technology may provide a credible sensing option for automated detect and avoid in small‐to‐medium size fixed‐wing unmanned aircraft systems (UAS). Reliable vision‐based aircraft detection has previously been demonstrated in sky‐region sensing environments. This paper describes a novel vision‐based system for detecting aircraft below the horizon in the presence of ground clutter. We examine the performance of our system on a data set of 63 near collision encounters we collected between a camera‐equipped manned aircraft and a below‐horizon target. In these 63 encounters, our system successfully detects all aircraft, at an average detection range of 1890 m (with a standard error of 43 m and no false alarms in 1.1 h). Furthermore, our system does not require access to inertial sensor data (which significantly reduces system cost) and operates at over 12 frames per second.     

铸牢网络空间中华民族共同体意识的知识图谱实践探索

构建社会主义核心价值观垂直领域知识图谱,铸牢网络空间的中华民族共同意识,实现思想政治教育、计算机学科、新兴交叉学科多学科融合.知识图谱构建包括知识建模,知识抽取、知识融合、知识存储四部分..构建完成的知识图谱有助于增强网络空间中华民族共同体意识传播的智力支持,丰富网络传播内涵,提升中华民族的凝聚力和向心力.