旅游自然景区下的设计行为初探

自然景区越来越成为生活在城市中的居民所向往的圣洁之地。随着自然景区被人们广泛的接触从而导致了"天然景观人为化"的现象。本文通过对旅游自然景区下旅游行为归纳分析以达到对设计行为的认知,并根据对九寨沟和黄龙景区的考察及调查的相关资料,对旅游自然景区下的设计行为进行解析用以说明"设计"对自然景区内天然景观与人为景观的重要性,以及应用设计的手段来解决"天然景观人为化"的问题,保持人为景观与天然景观的平衡。为今后旅游自然景区的设计活动拓展思路,提供新的设计视角。     

Testing a MODIS Global Disturbance Index across North America

Large-scale ecosystem disturbances (LSEDs) have major impacts on the global carbon cycle as large pulses of CO₂ and other trace gases from terrestrial biomass loss are emitted to the atmosphere during disturbance events. The high temporal and spatial variability of the atmospheric emissions combined with the lack of a proven methodology to monitor LSEDs at the global scale make the timing, location and extent of vegetation disturbance a significant uncertainty in understanding the global carbon cycle. The MODIS Global Disturbance Index (MGDI) algorithm is designed for large-scale, regular, disturbance mapping using Aqua/Moderate Resolution Imaging Spectroradiometer (MODIS) Land Surface Temperature (LST) and Aqua/MODIS Enhanced Vegetation Index (EVI) data. The MGDI uses annual maximum composite LST data to detect fundamental changes in land-surface energy partitioning, while avoiding the high natural variability associated with tracking LST at daily, weekly, or seasonal time frames. Here we apply the full Aqua/MODIS dataset through 2006 to the improved MGDI algorithm across the woody ecosystems of North America and test the algorithm by comparison with confirmed, historical wildfire events and the windfall areas of documented major hurricanes. The MGDI accurately detects the location and extent of wildfire throughout North America and detects high and moderate severity impacts in the windfall area of major hurricanes. We also find detections associated with clear-cut logging and land-clearing on the forest-agricultural interface. The MGDI indicates that 1.5% (195,580 km²) of the woody ecosystems within North America was disturbed in 2005 and 0.5% (67,451 km²) was disturbed in 2006. The interannual variability is supported by wildfire detections and official burned area statistics.     

An explicit duality for quasi-homogeneous ideals

Given r≥n$r\ge n$ quasi-homogeneous polynomials in n$n$ variables, the existence of a certain duality is shown and made explicit in terms of generalized Morley forms. This result, that can be seen as a generalization of [Corollary 3.6.14, Jouanolou, J.-P., 1996. Résultant anisotrope, compléments et applications. Electron. J. Combin. 3 (2), Research Paper 2, approx. 91 pp. (electronic), the Foata Festschrift] where this duality is proved in the case r=n$r=n$, was observed by the author at the same time. We will actually closely follow the proof of the above-cited corollary in this paper.     

基于关联规则的自然灾害预测系统

建立自然灾害预测模型,对自然灾害进行预测和分析,有利于提升防灾减灾的技术水平.基于关联规则和Web文本挖掘技术提出自然灾害预测系统的设计方案及实现方法.该系统利用成熟开源的爬虫框架从权威的灾害信息发布平台中定向抓取非结构化的自然灾害信息,通过中文分词技术进行数据清理将其整理成结构化的自然灾害数据库,并利用改进的关联规则算法从中挖掘出自然灾害事件的关联规则,进而可通过实时监控关联规则的前端信息,实现对自然灾害事件的预测.试运行结果表明该系统能有效挖掘出自然灾害信息的关联规则,并具有较高置信度.     

Quasi-rocking real-time pushdown automata

A pushdown automaton (PDA) is quasi-rocking if it preserves the stack height for no more than a bounded number of consecutive moves. Every PDA can be transformed into an equivalent one that is quasi-rocking and real-time and every finite-turn (one-turn) PDA can be transformed into an equivalent one that is quasi-rocking or real-time. The quasi-rocking [quasi-rocking in the increasing mode, and quasi-rocking in the decreasing mode] real-time restriction in finite-turn (one-turn) PDAs coincides with the double Greibach [reverse Greibach, and Greibach] form in nonterminal-bounded (linear) context-free grammars. This provides complete grammatical characterizations of quasi-rocking and/or real-time (finite-turn and one-turn) PDAs and, together with known relations and other relations proved in the present paper, yields an extended hierarchy of PDA languages. Basic decision properties for PDAs can be stated in stronger forms by using the quasi-rocking and real-time restrictions and their undecidability/decidability status rests on the way PDAs quasi-rock.     

天然气净化脱硫系统模拟与优化方案

针对陕北某天然气净化厂因靖边气田开发规模不断增大,致原料气中酸性组分含量较设计值高、生产系统故障频繁,本文选择Deshmukh-Mather方程作为理想的热力学模型和DESIGNⅡ软件全流程模拟MDEA溶液循环量提高后的脱硫系统,以确定需要核算的相关设备,最后利用FRI和HTRI等专业软件校核其优化前后的运行状况。结果表明,胺液吸收塔和再生塔的流体力学性能均符合要求,其工作点亦落在塔盘负荷性能图的中部适当位置;在现有浮头式胺液贫富液换热器的基础上,串联地增加1台同型号、同尺寸的换热器,并适当调整其换热管规格即可达到指定的换热要求,解决堵塞现象;用增加换热管管束、翅化换热管表面、提高热媒流率与进口温度等多种手段,均可提高胺液重沸器的换热效果。     

基于AJAX的智能检索在Web搜索的研究

为了实现Web智能检索,提出一种Web智能搜索引擎的模型,它是基于自然语言库和本体库对关键词进行解析,在AJAX模式中实现启发式检索,收集和使用用户反馈的重要叁数,并在此基础上设计和实现了一个Web搜索引擎。     

对已有信息表二次利用的程序开发

Excel是OFFICE家族成员中一个功能强大、技术先进、使用方便的数据管理和分析系统。而在Excel中使用VBA(Visual Basicfor Application的简称)对已有的信息表进行宏编程,可以使用户高效地生成新的工作表,达到办公自动化的目的。文章用班级成绩表生成重考报名表的实例,揭示了利用VBA在Excel中进行二次开发,提高工作效率,保证数据准确性的强大功能。     

有线电视工程预算系统的设计

工程预算是有线电视工程建设中必须的一项工作。叙述了有线电视工程预算编制的方法和步骤,设计了一种基于Access数据库的有线电视工程预算系统,并介绍了预算系统的设计方案和基本的功能。详细介绍了系统关键表和预算窗体的设计、材料表和机械台班表的数据追加、总计数额的计算、报表的设计和主界面的设计等建立系统所用到的关键技术。实践说明该系统可满足有线电视工程预算工作的需求。     

自然主义——新艺术者的梦幻出口——浅析自然主义在设计史上盛极而衰的原因

自然主义对许多艺术门类都产生过深刻影响,在设计领域中,以自然主义为主要特点的新艺术运动曾在一个重大的设计变革时期——工业革命后风靡各国,然而却又在短短十多年后沉寂下来,本文主要分析自然主义为什么会在设计史的重要阶段产生如此特别的表现。