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21.
Prediction of dust fall concentrations in urban atmospheric environment through support vector regression 总被引：1，自引：0，他引：1
Support vector regression (SVR) method is a novel type of learning machine algorithms, which is seldom applied to the development of urban atmospheric quality models under multiple socio-economic factors. This study presents four SVR models by selecting linear, radial basis, spline, and polynomial functions as kernels, respectively for the prediction of urban dust fall levels. The inputs of the models are identified as industrial coal consumption, population density, traffic flow coefficient, and shopping density coefficient. The training and testing results show that the SVR model with radial basis kernel performs better than the other three both in the training and testing processes. In addition, a number of scenario analyses reveal that the most suitable parameters (insensitive loss function e, the parameter to reduce the influence of error C, and discrete level or average distribution of parameters σ) are 0.001,0.5, and 2 000, respectively. 相似文献
22.
Azim Heydari Davide Astiaso Garcia Farshid Keynia Fabio Bisegna Livio De Santoli 《Energy Sources, Part B: Economics, Planning, and Policy》2019,14(10-12):341-358
ABSTRACTThis paper proposes a novel hybrid strategy based on intelligent approaches to forecast electricity consumptions. The proposed forecasting strategy includes three main steps: (a) the evaluation of a correlation coefficient for socio-economic indicators on electric energy consumptions, (b) the classification of historical and socio-economic indicators using the proposed feature selection method, (c) the development of a new combined method using Adaptive Neuro-Fuzzy Inference System and Whale Optimization Algorithm to predict electrical energy consumptions. The simulation results have been tested and validated by real data sets achieved within 1992 and 2010 in two pilot cases in a developing country (Iran) and a developed one (Italy). The research findings pinpointed the greater accuracy and stability of the new developed method for electrical energy consumption forecasting compared to existing single and hybrid benchmark models. 相似文献
23.
对水源热泵的能耗进行了分析,表明水源热泵机组的性能系数与水源温度直接相关,并对水源热泵空调系统集中冷热水供水系统夏季空调工况与冬季热泵工况的社会经济效益进行了计算与分析,结果表明,利用水源热泵建立集中冷热水供水系统的社会经济效益显著,具有节能与环保意义. 相似文献
24.
以江阴学院实践教学体系的构建为例,根据地域社会经济发展状况,强调应以高职人才培养目标为根本,构建实践教学体系.具体介绍了江阴学院构建实践教学体系的"四双制"指导思想以及一些具体的做法. 相似文献
25.
This article makes a case for using regional planning to improve the social and economic regional impact of land reform policy in developing countries. We focus on rural settlements in the Brazilian north-east, where land reallocation has been approached in a variety of ways over many decades. The study identifies problems deriving from the lack of a plan-led strategy, leading to failures in identifying sustainable areas and designing appropriate policy interventions on a regional scale. Based on the planning literature and our empirical results, it is proposed that different views on land reform should be combined into a broader regional strategy. This involves strategic targeting of specific areas to define a portfolio of investment and spending priorities, combined with intergovernmental and intersectoral co-ordination, running from the early stages of a project's formulation until the final stages of its implementation. Additionally, this paper shows that combining top-down and bottom-up approaches to land reform, and supplementing policy-making at the national level with programme/project design and implementation at the subnational level, allows an effective government response to rural poverty and landlessness. 相似文献
26.
《Information Systems Management》2012,29(1):75-92
ABSTRACTA major challenge faced by mobile health (mHealth) is identifying an evaluation technique which provides a rigorous evaluation while capturing the unique characteristics of the intervention. This study investigates traditional and emerging methods of mHealth evaluation, identifying existing gaps. This research is a useful first step toward developing an evaluation technique which will facilitate implementation and enable mHealth to reach its potential in accelerating socio-economic development, particularly in Low and Middle Income countries (LMICs). 相似文献
27.
Ewilly J.Y. Liew Santha Vaithilingam Mahendhiran Nair 《Behaviour & Information Technology》2014,33(4):345-360
Facebook is becoming increasingly important for the socio-economic development of countries across the globe as stakeholders engage in online social interaction and expand their reach for new products, services and markets to open up new revenue streams. Past studies have examined the environment that supports effective use of social networking technologies in the developed world. This study argues that the enabling environment in developed and developing countries may vary and therefore may impact Facebook adoption and its socio-economic benefits differently. The model integrates the Unified Theory of Acceptance and Use of Technology (UTAUT) and revised UTAUT. Using a structured questionnaire on a sample of 367 Facebook users, the results show that performance expectancy, effort expectancy, social influence and facilitating conditions (affordability and regulatory environment) are important factors that impact Facebook adoption in a developing country such as Malaysia. The study contributes to the literature by identifying that Facebook user's perceived socio-economic benefits act as a mediator between adoption and actual use behaviour (information seeking, socialisation, entertainment and business development). The findings also indicate that religion, ethnicity, language, gender and education are significant factors moderating the adoption-perception-use behaviour of Facebook. Theoretical and practical implications of the study are discussed in the paper. 相似文献
28.
退役坝拆除现状及其影响研究进展综述 总被引：1，自引：0，他引：1
我国降等与报废水库逐年增加,大坝退役拆除成为必然趋势。针对退役坝拆除问题,从各国拆坝数量、拆坝地区分布、拆坝原因和拆坝相关政策入手,对国内外大坝拆除现状进行分析总结,并对拆坝后对生态环境和社会经济产生的影响进行综述。研究发现国内外关于拆坝影响研究多为定性分析,缺少定量分析和一套切实可行的计算方法,且多为单因素研究,缺乏综合影响因素评估分析。由此展望未来的拆坝影响研究中应由定性分析向定量分析转变,并耦合水动力、泥沙、生物响应、水生环境等多方面因素,构建拆坝影响的综合评估体系。 相似文献
29.
30.
Socio-economic impact assessment (SEIA) is conducted in advance to determine the socioeconomic consequences of industrial projects. The focus is on the project-affected people. All possible data is collected from census information and academic institutions. Personal interviews are also conducted with the local people and their administrative heads. The main phases of the project addressed are pre- construction, construction and operation. Issues addressed include compensation payment for the land, provision of employment, and alternative accommodation for the people affected. A decision on the acceptability of the project is taken after assessing the positive and negative socio-economic impacts. 相似文献