浅析园林植物配置

园林植物配置,又称植物造景或景观种植。植物配置在园林设计中起着非常重要的作用,在运用植物进行配置时,既要考虑植物配置的艺术要求,又要考虑植物配置原则,合理配置园林中的各种植物,以发挥他们的园林功能和观赏特性,创造出优美的景观效果。     

浅谈园林植物资产价值评估

园林植物具有观赏价值,能给社会和个人带来效益,所以要对其进行资产价值评估,其价值评估涉及到平时的管理养护费用,植物的价格,潜在的美化环境的功能,较高的观赏价值等。由于园林植物具有诸多的明显的、潜在的功能价值,使得有园林的土地价值无形中也增长了。大多数房地产的价格都会受到园林绿化程度好坏的影响,因此,园林植物的价值是有待进一步发掘的。本文主要讨论园林植物的资产价值评估。     

Bush v. Gore and the Effect of New Source Review on Power Plant Emissions

New Source Review (NSR) is a Clean Air Act regulation that requires electric utilities to meet emission standards when making modifications to existing power plants. The regulation increases the cost of replacing worn out parts, and limits the firm’s scope of potential capital investments. Such restrictions may lead to greater retirements and lower utilization, adversely affecting profits. Prior to the 2000 presidential election, investors expected Bush to have a narrower interpretation of NSR than Gore. Therefore, we use changes in stock prices to estimate the effect on profits of differences in NSR policy. Our results indicate that investors expected the average boiler to be $38 million more valuable under the Bush administration. Over the boilers’ lifetimes, the additional utilization will have increased emissions by 19 million tons of sulfur dioxide, 5.9 million tons of nitrogen oxides and 980 million tons of carbon dioxide, relative to natural gas generation.      

火电厂烟气脱硫特许经营相关影响因素分析

从我国火电厂烟气脱硫行业发展现状入手,论述了脱硫产业健康发展需要市场化的污染治理新机制及火电厂烟气脱硫特许经营的主要内容和进展,对影响烟气脱硫特许经营健康发展的因素进行了分析,提出了有利于促进脱硫特许经营健康发展的政策建议。     

Economic Potential of Biomass Based Fuels for Greenhouse Gas Emission Mitigation

Use of biofuels diminishes fossil fuelcombustion thereby also reducing net greenhousegas emissions. However, subsidies are neededto make agricultural biofuel productioneconomically feasible. To explore the economicpotential of biofuels in a greenhouse gasmitigation market, we incorporate data onproduction and biofuel processing for thedesignated energy crops switchgrass, hybridpoplar, and willow in an U.S. AgriculturalSector Model along with data on traditionalcrop-livestock production and processing, andafforestation of cropland. Net emissioncoefficients on all included agriculturalpractices are estimated through crop growthsimulation models or taken from the literature. Potential emission mitigation policies ormarkets are simulated via hypothetical carbonprices. At each carbon price level, theAgricultural Sector Model computes the newmarket equilibrium, revealing agriculturalcommodity prices, regionally specificproduction, input use, and welfare levels,environmental impacts, and adoption ofalternative management practices such asbiofuel production. Results indicate no rolefor biofuels below carbon prices of $40 perton of carbon equivalent. At these incentivelevels, emission reductions via reduced soiltillage and afforestation are more costefficient. For carbon prices above $70,biofuels dominate all other agriculturalmitigation strategies.     

园林景观中水生植物的应用

在营造园林水景时,水生植物不仅极大地丰富了园林的水体景观,还将景观美学与生态系统保护巧妙地结合为一体。目前的水生植物造景上仍然存在一些问题,只有遵循一定的应用原则,才能营造功能与美观相结合的现代园林水景。     

浅谈水生植物对生活污水的净化作用

本文探讨水生植物对生活污水的净化作用,它主要有沉降悬浮物、吸收营养物质、吸收重金属等直接作用和为根际提供氧气使微生物有效降解有机物的间接作用等。为建立人工生态系统治理生活污水提供科学参考。     

福建省的国家重点保护野生植物资源及其价值

对分布于福建省的44种国家重点保护野生植物资源及价值作了初步研究,并提出了几点保护建议。     

基于风水理念的园林景观植物气场营造

园林植物不但具有美化环境、陶冶情操的功能,还具有改善环境,净化空气和保健人体的作用。以风水学理论为基础,通过对植物的阴阳、五行、相生相克及其与人体健康关系的分析,探讨了植物气场的存在及其保健作用,提出了园林景观设计中基于风水理论、保健理念的植物气场营造方法。     

环境约束下中国省域旅游经济效率及其影响因素的空间计量分析

采用Super-SBM方法将环境因素作为非期望产出纳入旅游经济效率测算框架,结合空间计量经济方法分析2005—2016年我国省域旅游经济效率空间关联性及影响因素溢出效应,结果显示:环境约束下,我国省域旅游经济具有一定的空间集聚趋势,呈现出"东南热、西北冷"的分布特征,尚未实现网状结构均衡发展;我国省际旅游经济效率间存在显著的空间溢出作用。对于环境约束下旅游经济效率发展来说,人均GDP、技术创新、市场化、环境规制均有显著的正向作用,路网密度作用不显著,外国直接投资(FDI)有显著的负向作用。影响因素的溢出效应来看,市场化、经济增长、技术创新具有显著的积极间接溢出效应,但环境规制带来了显著的负向间接溢出效应,FDI与路网密度的间接溢出效应不显著。