共查询到20条相似文献,搜索用时 750 毫秒
1.
2.
Danijela Despotovic Slobodan Cvetanovic Vladimir Nedic 《Journal of Environmental Planning and Management》2016,59(9):1656-1678
Over the last decade, promotion of competitiveness represents one of the central goals of economic policy of most of the countries. Moreover, in recent years, the promotion of competitiveness has been seen as a way of achieving desirable changes in economy and society. While there is no unity of views in the theory regarding the conceptual definition of the phenomenon of competitiveness, it is becoming less arguable that in strictly economic terms, competitiveness is a synonym for productivity. However, it should be noted that productivity growth that is accompanied by increasing social imbalance (for example, inequality in income distribution), on the one hand, and environmental pollution, on the other hand, cannot be a guarantee of improving the competitiveness of countries in the long run. Acknowledging precisely this fact and using the data from World Economic Forum on Global Competitiveness 2013, this paper elaborates on the phenomenon of sustainable competitiveness and tests the hypothesis about the positive impact of its social and environmental dimension on the economic dimension of sustainable competitiveness that is represented by the value of the Global Competitiveness Index. The survey of 34 countries confirmed the indisputable positive impact of the social dimension of sustainability, but also variable direction of the impact of the environmental dimension of sustainability (depending on the level of GDP per capita) on the economic dimension of sustainable competitiveness of European countries in 2013. 相似文献
3.
Welch功率谱估计方法的参数选择 总被引:4,自引:0,他引:4
研究了welch谱估计方法中窗函数和窗长度及FFT点数对谱估计结果的影响,应用Matlab中的Pwelch函数,作了仿真分析。根据分析结果,提出了有关窗函数、窗长度和FFT点数确定问题的建议。 相似文献
4.
5.
新时期高校学生党建工作的探讨 总被引:2,自引:0,他引:2
蒋志宏 《中国环境管理干部学院学报》2009,19(4):120-122
高校学生基层党建工作,是高校党建工作的重要组成部分,对于坚持党的领导,保持学生党员的先进性、发挥先锋模范作用,加强学生的思想政治教育,推进校风、学风建设具有非常重要的作用。对当前高校学生党建工作存在的问题进行了分析,并提出了几点对策。 相似文献
6.
云南省粮食产量影响因素的实证研究 总被引:1,自引:0,他引:1
采用实证分析的方法,以云南省为例,选取影响云南省粮食产量的8个因素(耕地面积、粮食播种面积、粮食单产、有效灌溉面积、化肥施用量、受灾面积、农业机械总动力、农村用电量),并根据这8个因素对2000-2004年的原始统计数据进行了灰色关联度分析和因子分析。经研究表明,影响云南省粮食产量的因素可以归纳为农业土地利用状况和农业现代化水平,具体体现在耕地面积、粮食播种面积、粮食单产、化肥施用量、有效灌溉面积、农业机械总动力这6个方面。根据研究结论和目前云南省粮食产量的现状,提出了解决云南省粮食安全的对策与建议。 相似文献
7.
通过对高盐废水COD测定时氯离子干扰与氧化剂浓度的关系研究发现:氧化剂浓度对氯离子干扰程度有较大的影响。根据研究结果,提出了用分段重铬酸钾法测定高盐废水COD的设想,并对此设想进行了验证。验证结果表明:用分段重铬酸钾法测定高盐废水COD的设想是完全可行的;而且方法的准确度较好,相对误差<9%,实际废水加有机物的回收率>92%。 相似文献
8.
9.
针对城市化进程加快引发的一系列环境污染问题,指出了加快污染防治设施社会化运营的必要性,并从污染治理设施的种类、污染治理设施的社会化运营分析和运作模式三方面论述了如何进行污染治理设施的社会化运营,从经济发展、污染防治设施运行、引入竞争机制等方面概述了污染防治设施社会化运营对区域环境与经济协调发展的影响。 相似文献
10.
Environmental Effects of Aquifer Overexploitation: A Case Study in the Highlands of Mexico 总被引:7,自引:0,他引:7
There are several environmental processes occurring under aquifer overexploitation conditions. These processes include groundwater
table decline, subsidence, attenuation and drying of springs, decrease of river flow, and increased pollution vulnerability,
among others processes. Some of these effects have been observed on the Upper Basin of the Lerma River. The Lerma River begins
in the SE of the Valley of Toluca at 2,600 m asl, in the wetland known as Lagoons of Almoloya del Río. This wetland is made
up of a group of lagoons, which are an important aquatic system from an environmental point of view. The water inflow of this
wetland is a discharge of springs, which occur between the fractured volcanic material of the mountain range and granular
volcanic–continental deposits of the Valley of Toluca aquifer. The intensive exploitation of the Valley of Toluca aquifer
to supply urban and industrial water to Mexico City and Toluca began in 1950 and is responsible for a steady decline of piezometric
levels of 1–3.5 m/yr. Other effects of this exploitation—the drying of the wetland, the decrease of river flow and the land
subsidence—caused serious ecological and social impacts. The authorities declared this aquifer as overexploited in order to
reduce the exploitation and preserve the availability of water resources in this important region. 相似文献
11.
推进生态环境保护督察往纵深方向发展需要完善生态环境保护督察制度。生态环境保护督察制度建设具备政治支持、实践基础和制度铺垫等条件。完善生态环境保护督察制度建设以习近平生态文明思想为根本遵循,坚持党的领导,突出问题导向,充分发扬民主。应当完善生态环境保护督察领导小组及其办公室、生态环境保护督察组、生态环境部及其区域督察局等生态环境保护督察主体制度,明确生态环境保护督察组享有检查权、处置权、请求协助权、交办权、督察情况述评权、问责建议权等。完善生态环境保护督察制度应当对地方党委、政府及有关部门、党政领导干部落实中央生态文明建设的决策部署、执行生态环境保护法律法规、履行生态环境保护职能等开展督察。生态环境保护督察可以采取集中督察、"回头看"督察、专项督察、常态督察等形式。除常态督察外,生态环境保护督察主要包括督察准备、督察进驻和进行、督察意见和整改、督察结束、督察后处理等环节。 相似文献
12.
自然资源估价及其在国民经济发展中的作用 总被引:2,自引:0,他引:2
自然资源无价、资源产品低价导致资源需求过度膨胀,资源浪费严重,环境污染加剧.自然资源产权市场化、多元化是解决这一问题的关键,也是我国经济发展的必然趋势.自然资源估价是资源市场化、多元化的价值依据.自然资源估价不同于资源产品定价,既要考虑资源的价值又要考虑资源的稀缺性、丰饶度、地理位置等因素.自然资源估价关系到资源的合理开发利用和环境保护问题,对我国的社会主义现代化进程和人民生活水平的提高将构成重大影响. 相似文献
13.
边境型旅游地因其独特的边境自然风貌、浓厚的异族风情在我国丰富的旅游资源中占有重要地位。通过实地考察,根据游客调查问卷数据和二手资料,与海滨型旅游地普陀山、古村落型旅游地西递和宏村、山岳型旅游地泰山进行了对比分析,揭示了延边朝鲜族自治州国内旅游者的人口学特征、旅游行为、旅游效果等,并就促进其旅游业的进一步发展提出了建议。 相似文献
14.
D. L. Fread 《Journal of the American Water Resources Association》1973,9(2):338-351
ABSTRACT The effects of the size of the Δt time step used in the integration of the implicit difference equations of unsteady open-channel flow are determined for numerous typical hydrographs with durations in the order of days or even weeks. Truncation errors related to the size of the Δt time step cause a numerical distortion (dispersion and attenuation) of the computed transient. The magnitude of the distortion is related directly to the size of the time step, the length of channel reach, and the channel resistance and inversely to the time of rise of the hydrograph. The type of finite difference expression which replaces spatial derivatives and non-derivative terms in the partial differential equations of unsteady flow has an important influence on the magnitude of the numerical distortion, as well as the numerical stability of the implicit difference equations. Time step sizes in the range of 3 to 6 hrs generally tend to minimize the combination of required computation time and numerical distortion of transients having a time of rise of the order of several days. 相似文献
15.
J. R. Park M. J. Stabler S. R. Mortimer P. J. Jones D. J. Ansell G. P. D. Parker 《Journal of Environmental Planning and Management》2004,47(5):773-793
A range of funding schemes and policy instruments exist to effect enhancement of the landscapes and habitats of the UK. While a number of assessments of these mechanisms have been conducted, little research has been undertaken to compare both quantitatively and qualitatively their relative effectiveness across a range of criteria. It is argued that few tools are available for such a multi-faceted evaluation of effectiveness. A form of Multiple Criteria Decision Analysis (MCDA) is justified and utilized as a framework in which to evaluate the effectiveness of nine mechanisms in relation to the protection of existing areas of chalk grassland and the creation of new areas in the South Downs of England. These include established schemes, such as the Countryside Stewardship and Environmentally Sensitive Area Schemes, along with other less common mechanisms, for example, land purchase and tender schemes. The steps involved in applying an MCDA to evaluate such mechanisms are identified and the process is described. Quantitative results from the comparison of the effectiveness of different mechanisms are presented, although the broader aim of the paper is that of demonstrating the performance of MCDA as a tool for measuring the effectiveness of mechanisms aimed at landscape and habitat enhancement. 相似文献
16.
风景区旅游环境容量的经济学分析--兼论黄金周规模经济现象 总被引:3,自引:0,他引:3
在分析旅游黄金周部分景区超载规律的基础上,指出了在景区经营中旅游环境容量是规模经济性的度这个关系,景区超载即会产生规模不经济;并从规模经济学的角度提出了开发多元产品和调整产品线路结构等提高旅游环境容量的方法和措施. 相似文献
17.
农药人工抗原的合成直接影响制备抗体的质量,是建立农药分子特异性强、灵敏度高的免疫分析方法的关键。本文综述了国内外对于氨基甲酸酯类广泛使用的3种农药甲萘威、克百威、涕灭威人工抗原合成过程中的农药分子半抗原的设计原则、合成方法,人工抗原的设计、优选及影响因素等方面的研究进展。 相似文献
18.
A comparative analysis of solid waste composition and generation in two cities of a developing nation 总被引:1,自引:0,他引:1
Afolabi A. Adedibu 《The Environmentalist》1985,5(2):123-127
Summary The solid wastes generated by a sample of the residents of two Nigerian cities are analysed in terms of the types of waste and the socio-economic circumstances of the residents. The types of waste produced suggest drastic modifications to the current means of waste collection and disposal, together with possible improvements in the existing forms of environmental training.Dr Adedibu is Professor of Geography at the University of Ilorin, Nigeria. 相似文献
19.
《刑法修正案(十一)》修订呈现出刑事立法对于预防与从严惩处犯罪理念的贯彻,在回应风险社会诉求的同时,立法价值观、犯罪观、刑罚观层面客观存在的二律背反现象,引发了学界对于刑罚介入边界的激烈争论。本文基于648份污染环境罪判决书,利用回归分析对污染环境罪包括有期徒刑、拘役、缓刑在内的多个判决结果与影响因素间的内在机理进行实证分析。研究表明,污染环境罪刑罚存在刑罚力度整体轻缓,金钱类环境责任序位混乱,将环境修复作为量刑情节考量指引效果较弱等问题。针对以上问题,一方面通过宽严相济纾解刑罚适用“轻刑化”之困,并重新区分以危险犯和实害犯为基准的刑罚结构;另一方面通过生态修复规范化建立积极的司法导向,并以此重构罚金刑体系。从而达到犯罪控制与生态恢复双重目的,为污染环境罪刑罚研究添砖加瓦,形成具有中国特色的环境犯罪刑罚治理体系。 相似文献
20.
Gerardo Arturo Huguet-Sierra Adriana Mercedes Márquez-Romance Edilberto Guevara-Pérez Sergio Alejandro Pérez-Pacheco Eduardo Buroz-Castillo 《环境质量管理》2023,33(1):257-277
The objective of this work is to analyze and interpret the components or hydrogeological, physical, and chemical variables of the San Diego aquifer to describe it and explain its influence on the sustainable use of groundwater for the providing of this locality. The San Diego municipality covers most of the area of the aquifer and is an area of high urban development that currently needs the contribution of groundwater due to the deficit presented by the main supply from the Central Regional System. Said aquifer is a set of geological strata located within the limits of the San Diego River basin, in the state of Carabobo, which are capable of storing groundwater and transmitting it. Data on lithology, porosity, and pumping level were investigated, which allows calculating an estimate of the volume of water available in the aquifer. Regarding the quality of the water, the data on hardness, chlorides, sulfates, nitrates, conductivity, calcium, magnesium, and pH, show that the water towards the center and north of the aquifer is of good quality, being able to classify it as type 1A, while toward the southern end—this is of lower quality, where the mineral parameters are higher, which is related to the probable intrusion of brackish water from Lake Valencia. It is concluded by establishing that the volume of groundwater, its availability, extraction feasibility, and its quality, make it suitable for urban supply and that said extraction is sustainable. But a better-integrated type of management must be designed, considering the contribution of the Regional System of the Center and the adequacy of the distribution networks. 相似文献