Ecological Planting Imperative: Functional Systems,Not Stylized Ecologies

The ability of landscape architectural projects to mitigate the worst effects of climate change will depend upon designed ecological systems. These systems will be built with plants. Despite the recognition of ecology as an essential driver of landscapes, the professionals of landscape architecture too often lack the knowledge and practical skills to create robust vegetative systems. New approaches and tools are required. This article outlines principles and methods for designing biodiverse plant systems for urban sites. Planting methods that increase species richness, functional diversity, and spatial complexity are emphasized as a way of developing more resilient plantings. Selecting species with similar evolutionary adaptions to stress, disturbance, and competition—as well as creating multi-layered compositions of diverse plant morphologies—allows designers to create compatible, long-lived plant mixes. To balance the increased visual complexity of diverse plant mixes, the article explores design techniques to make plantings more appealing to the public. The strategies explored here are based on the projects, experience, and research of Phyto Studio, a Washington, D.C. based studio. The methods build on work described in the author’s book, Planting in a Post-Wild World, an exploration of how to create designed plant communities.     

施肥模型研究综述

对施肥模型和参数研究的历史、现状和趋势进行了综述,并指出今后定量施肥研究的关键问题。     

An approach to the synthesis of qualitative ecological information from aquatic coleoptera communities

A list of 196 Coleoptera taxa, larvae and adults, covering 113 species, was obtained from several surveys of a flood plain of the Rhô river. From published reports and personal experience, each taxon is linked with the modalities of nine environmental and three biological variables. The resulting 12 ecological profiles for 196 taxa are analysed by correspondence analysis. The simultaneous ordination of the taxa and variables allows presentation of the more synthetic correspondence between the Coleoptera and their ecological and biological characteristics. The niche dimensions of the 12 variables tested here are organized along a current-substrate gradient, from stones in rapid flow to mud in still water, which is associated with the other ecological conditions. This ordination reflects environmental conditions in a transverse direction, particularly from the central channel to the furthest annexes of the river. The Coleoptera are shown to be describers of the connectivity with the main channel. The 196 studied taxa are positioned along the gradient. They are subdivided into seven faunal groups based on their habitat range or niche width. The larger species are confined to the stagnant side of the gradient. Other variables, such as feeding and vertical distribution, clearly separate carnivores from herbivores and also larvae from adults. The next step of this study will be to extend these investigations to other functional variables and to all the species of Coleoptera in France. The information given by the Coleoptera will then be compared with actual field measurements.     

Design of new catalysts for ecological high-quality transportation fuels by combinatorial computational chemistry and tight-binding quantum chemical molecular dynamics approaches

Recently, we introduced a concept of combinatorial chemistry to computational chemistry and proposed a new method called “combinatorial computational chemistry”, which enables us to perform a theoretical high-throughput screening of catalysts. In the present paper, we reviewed our recent application of our combinatorial computational chemistry approach to the design of new catalysts for high-quality transportation fuels. By using our combinatorial computational chemistry techniques, we succeeded to predict new catalysts for methanol synthesis and Fischer–Tropsch synthesis. Moreover, we have succeeded in the development of chemical reaction dynamics simulator based on our original tight-binding quantum chemical molecular dynamics method. This program realizes more than 5000 times acceleration compared to the regular first-principles molecular dynamics method. Electronic- and atomic-level information on the catalytic reaction dynamics at reaction temperatures significantly contributes the catalyst design and development. Hence, we also summarized our recent applications of the above quantum chemical molecular dynamics method to the clarification of the methanol synthesis dynamics in this review.     

论物联网技术对于智慧城市的应用

物联网技术随着现代网络的进一步发展以及云技术的成熟,在智能化和通讯功能上都有较强的实用性。当前,智慧城市的构建理念正逐步成为城市发展的重点方向之一,在构建智慧型城市的过程中,运用物联网技术将会使得城市的智能化水平得到极大地提升,本文探讨了物联网与智慧型城市构建之间的重要关系,并通过分析物联网在智慧城市设计中的实际运用,以探究出实现智慧型城市的更佳方法.     

模糊C-均值聚类分析研究大亚湾水质空间分布规律

模糊C-均值聚类方法研究人类活动影响下大亚湾海域水体生态环境空间分布规律．揭示大亚湾水体生态环境空间分布分成两类区域：其一为受人类活动影响为主的大鹏澳、澳头以及大亚湾东北部区域;其二为受湾外南海海水交换影响较大的大亚湾南部、中部和东部海域。模糊C-均值聚类分析作为一种数据信息提取方法,为海洋环境生态研究提供新的方法。     

临川区土地生态环境安全评价研究

通过对临川区土地生态环境的研究,采用德尔菲法、等距划分法、加权指数法,确定该区域生态环境评价指标、权重、以及安全等级,得出临川区各乡镇的生态环境安全指数,为临川区土地生态环境安全建设提出建议。     

基于纹理特征与随机森林的生态声音识别

针对真实环境中普遍存在的非平稳噪声,提出一种基于纹理特征与随机森林的生态声音识别方法。该方法首先使用一种基于噪声估计的音频增强算法,即短时谱估计对输入端声音信号进行前端处理,得到增强信号功率谱;然后根据得到的增强信号功率谱图的纹理信息,采用和差统计法对其进行纹理特征提取;最后,利用基于决策树的组合分类器,即随机森林进行识别和分类。设计了两组对比实验,结果表明该方法不仅有良好的识别性能,而且具有噪声鲁棒性。     

碟形湖在鄱阳湖湿地生态系统的作用和意义

"碟形湖"是指鄱阳湖湖盆区内枯水季节显露于洲滩之中的季节性子湖泊,具有特殊的地貌特征和水文特性、复杂多变的湿地景观和丰富的生物多样性等特征.在碟形湖及其周边,湿生与水生植物群落有序分布、季节性演替;静水水域有利于底栖动物和鱼类生长育肥;缓慢下降的水位、逐渐伸展的泥滩为越冬候鸟持续提供丰富的食物和歇息环境,全湖80%以上的水鸟在碟形湖区域越冬.高低不一、分布广泛的碟形湖群有效地缓解了干旱、洪水灾害对鄱阳湖湿地生态系统的冲击,对于维护全球生态系统的完整性和生物多样性具有重要作用.最后提出了加强碟形湖保护和管理的对策.     

河道生态护坡技术在宜春市城市防洪工程中的运用

根据国内有关城市河道治理的先进经验,采用了生态护坡技术在江西省宜春市城市防洪工程中的应用,取得显著效果.