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81.
Sustainable Development and Management of Water Resources in the Hei River Basin of North-west China
The quantitative and qualitative evaluation of water, land and biotic resources in the inland river basins is important in the arid zone. Analysis of the exploitation potential of water resources and the environmental changes through water development can help people in the sustainable development and management of water resources within the basin. Water resources development has affected the scale of oasis establishment in the middle reaches and the existence of lower-reach oases in the Hei River basin. Exploitation and utilization of water resources at the present stage should bring about a harmonic relation between economic development and the ecological environment in the whole basin. The whole area should be considered as an entirety to adopt feasible engineering and administrative measures such as strengthening the protection of water resources in upper streams, macro-control of water consumption and implementing water-saving measures in middle and lower reaches, quantitatively managing and allotting water resources in accordance with regional conditions and adherence to comprehensive rehabilitation. Thus, economic, environmental and social benefits of water resources can be enhanced. 相似文献
82.
This paper demonstrates howadditional rents are generated in a fisherycharacterized by intraseasonal variation infish characteristics, including size,condition, and composition. Based on anexpanded conceptual model of the optimalharvest rule, fish characteristics affect preand post harvest production yields and outputprices. A dynamic empirical model, which uses asystem of quality characteristics and anhedonic equation, illustrates the complexrelationships and management choices associatedwith internalizing seafood qualitycharacteristics in a hake fishery. The modelretains the regulated open access managementsystem, but controls intertemporal andintersectoral quotas, production portfolios,and total allowable catch. Results demonstratethat including revenue-side effects frominternalizing fish quality can generatesignificantly greater rents and reduce therelative benefits of increased productionyields. If excluded, bioeconomic models canunderestimate the level of regulatory rentdissipation and overemphasize managementobjectives such as full utilization, whichcould misdirect processing decisions and resultin a suboptimal resource management plan.Implications for data collection,multidisciplinary analysis, and improvements inmarine resource management are discussed. 相似文献
83.
关于我国都市经济圈发展的几个问题 总被引:2,自引:0,他引:2
都市经济圈,通常是指由若干城市集聚而成的高密度经济区域,在空间上表现为由大运量的高速通道相联结的、庞大的、多核心、多层次的城市群.在这个空间里,由于集聚形成的规模经济和范围经济,加之高速通道缩短了城市间的空间距离和经济距离,生产和服务的交易成本、运营成本和管理成本大大降低,投资回报率和要素收益率明显提高. 相似文献
84.
本文分析了在知识经济兴起的环境下我国现行会计模式存在的缺陷,并根据知识经济发展的历程以及我国目前工业经济与知识经济并存的现状,提出了一种能适应两种经济形态的兼容性会计模式,最后指出了目前实施该模式尚存在的制约因素。 相似文献
85.
金融效率视角的中国农村金融体制创新研究 总被引:3,自引:0,他引:3
当前农村金融效率低下已经成为中国金融体制的“软肋”和解决“三农”问题的重要障碍, 因此必须从金融产权、金融结构、金融价格、金融业务、金融业内部管理、外部环境等方面入手, 全面推动农村金融创新, 才能从根本上提高中国农村金融的运行效率。 相似文献
86.
王晓东 《吉林商业高等专科学校学报》2005,(4):77-78
本文在体育锻炼能够增强体质,提高健康水平的生物学基础上和群众体育锻炼与专业训练的区别上,提出群众体育锻炼中如何合理安排运动量。 相似文献
87.
拓宽我国体育产业融资渠道的对策研究 总被引:1,自引:0,他引:1
本文采用文献研究法,结合我国体育产业发展的现状,提出吸引风险投资、设立体育产业投资基金和体育彩票融资是目前我国体育产业较为理想的融资渠道。 相似文献
88.
TETRA为Terrestrial Trunked Radio(陆上集群无线电)的缩写,是ETSI(欧洲电信标准协会)制定的数字集群标准,它最初的名字为Tran S—European Trunked Radio(泛欧集群无线电)。[编按] 相似文献
89.
J. L. Bencze 《International Journal of Technology and Design Education》2001,11(3):273-298
The status quo for school science and technology is unacceptable. While the former often is required for admission to university engineering,
as well as to science programmes, the latter is deemed most appropriate for less able, concrete thinkers. This situation persists,
despite the fact school science tends to generate large groups of citizens who are relatively scientifically and technologically
illiterate, largely as a result of its preoccupation with identifying and training potential scientists and engineers. This
practice is tyrannical. It must be abandoned forthwith. A realistic alternative is a combined technology and science programme
– perhaps called 'technoscience' education – that would treat science and technology as equals. Such courses may, as well,
be more democratic in the sense that technological problem solving often is more natural to everyday situations that everyone
may find useful, not just future scientists or engineers. A framework for combined technology and science courses is described
and defended here. Originally developed through collaborative action research amongst practising teachers of science, the
approach appears to be feasible, under certain – perhaps ideal – conditions. A number of changes to science and technology
education may be necessary for broader implementation, not the least of which is a general retrenchment in expectations for
pre-determined learning, along with adjustments to teacher education. Nevertheless, the approach is recommended because of
its emphasis on: personalization, inclusion, problematization, explicitness, apprenticeship, authenticity, contextualization
and freedom.
This revised version was published online in July 2006 with corrections to the Cover Date. 相似文献
90.